Refactoring tests and moving code to common module

1. All tests have been converted into regular command-line mocha
   tests (instead of running in the browser), and the deployment
   script has been changed to automatically fail any `--new`
   deployment which doesn't pass.
2. Several small class (e.g., `Logger`) have been moved into a common
   module, `crafting-guide-common` so that they may be shared between
   the client and server.

src/coffee/models/item.coffee

@@ -5,12 +5,12 @@ Copyright (c) 2014-2015 by Redwood Labs
 All rights reserved.
 ###
 
-BaseModel      = require './base_model'
-{Event}        = require '../constants'
-ItemSlug       = require './item_slug'
-Recipe         = require './recipe'
-StringBuilder  = require './string_builder'
-{Url}          = require '../constants'
+BaseModel       = require './base_model'
+ItemSlug        = require './item_slug'
+Recipe          = require './recipe'
+{Event}         = require '../constants'
+{StringBuilder} = require 'crafting-guide-common'
+{Url}           = require '../constants'
 
 ########################################################################################################################
 

src/coffee/models/parser_versions/command_parser_version_base.coffee

@@ -5,7 +5,7 @@ Copyright (c) 2015 by Redwood Labs
 All rights reserved.
 ###
 
-StringBuilder = require '../../models/string_builder'
+{StringBuilder} = require 'crafting-guide-common'
 
 ########################################################################################################################
 

src/coffee/models/parser_versions/mod_version_parser_v1.coffee

@@ -11,7 +11,7 @@ ItemSlug                 = require '../item_slug'
 ModVersion               = require '../mod_version'
 Recipe                   = require '../recipe'
 Stack                    = require '../simple_stack'
-StringBuilder            = require '../string_builder'
+{StringBuilder}          = require 'crafting-guide-common'
 
 ########################################################################################################################
 

src/coffee/models/recipe.coffee

@@ -5,10 +5,10 @@ Copyright (c) 2014-2015 by Redwood Labs
 All rights reserved.
 ###
 
-BaseModel     = require './base_model'
-{Event}       = require '../constants'
-Stack         = require './stack'
-StringBuilder = require './string_builder'
+BaseModel       = require './base_model'
+Stack           = require './stack'
+{Event}         = require '../constants'
+{StringBuilder} = require 'crafting-guide-common'
 
 ########################################################################################################################
 
@@ -119,7 +119,8 @@ module.exports = class Recipe extends BaseModel
                 actuallyProduces = not @isPassThroughFor stack.itemSlug
                 @_produces[stack.itemSlug.qualified] = actuallyProduces
 
-        return @_produces[itemSlug.qualified] or @_produces[itemSlug.item]
+        result = @_produces[itemSlug.qualified] or @_produces[itemSlug.item]
+        return result
 
     requires: (itemSlug)->
         for stack in @input

src/coffee/models/string_builder.coffee

@@ -1,122 +0,0 @@
-###
-Crafting Guide - string_builder.coffee
-
-Copyright (c) 2015 by Redwood Labs
-All rights reserved.
-###
-
-########################################################################################################################
-
-module.exports = class StringBuilder
-
-    constructor: (options={})->
-        options.indent       ?= 0
-        options.indentString ?= '    '
-
-        @context = options.context
-
-        @_initialIndent = options.indent
-        @_indent        = options.indent
-        @_indentString  = options.indentString
-        @_pieces        = []
-
-    # Public Methods ###############################################################################
-
-    call: ->
-        args = (arg for arg in arguments)
-        callback = args.pop()
-        args.unshift this
-        return unless _.isFunction callback
-
-        callback.apply null, args
-
-    clear: ->
-        @_indent = @_initialIndent
-        @_pieces = []
-        return this
-
-    indent: ->
-        @_indent += 1
-        return this
-
-    line: (args...)->
-        @push.apply(this, args) if args.length > 0
-        @push '\n'
-
-    loop: (list, options={})->
-        options.start     ?= ''
-        options.end       ?= ''
-        options.indent    ?= false
-        options.delimiter ?= ', '
-        options.onEach    ?= (builder, item)-> builder.push item
-
-        @_pushText options.start
-        if options.indent then @indent()
-
-        isFirst = true
-        for item in list
-            if not isFirst then @push options.delimiter
-            isFirst = false
-            options.onEach this, item
-
-        if options.indent then @outdent()
-        @_pushText options.end
-
-        return this
-
-    onlyIf: (condition, callback=null)->
-        return this unless condition
-
-        callback ?= (builder)-> # do nothing
-        callback this
-        return this
-
-    outdent: ->
-        @_indent -= 1
-        return this
-
-    push: ->
-        for i in [0...arguments.length]
-            arg = arguments[i]
-
-            if _.isArray arg
-                @push.apply this, arg
-            else if _.isString arg
-                @_pushText arg
-            else
-                @_pushText "#{arg}"
-
-        return this
-
-    # Object Overrides #############################################################################
-
-    toString: ->
-        return @_pieces.join ''
-
-    # Private Methods ##############################################################################
-
-    _pushIndent: ->
-        for i in [0...@_indent]
-            @_pieces.push @_indentString
-
-    _pushText: (text)->
-        return if text.length is 0
-        index = 0
-
-        if @_pieces.length > 0
-            lastPiece = @_pieces[@_pieces.length-1]
-            if lastPiece[lastPiece.length-1] is '\n'
-                @_pushIndent()
-
-        while true
-            newLineAt = text.indexOf '\n', index
-            break if newLineAt is -1
-
-            @_pieces.push text[index..newLineAt]
-            index = newLineAt + 1
-
-            break if newLineAt is text.length - 1
-            @_pushIndent()
-
-        if text.length > index
-            @_pieces.push text[index...text.length]