Bug: Make sure mod recipes for MC items show up

This fixes a regression where recipes for vanilla Minecraft items
(e.g., Iron Ingot) added by mods (e.g., Pulverized Iron to Iron
Ingot) didn't show up on that item's detail page.

src/coffee/models/parser_versions/mod_parser_v1.coffee

@@ -25,7 +25,7 @@ module.exports = class ModParserV1 extends CommandParserVersionBase
 
     _command_author: (authorParts...)->
         if @_rawData.author? then throw new Error 'duplicate declaration of "author"'
-        author = authorParts.join ''
+        author = authorParts.join ', '
         if author.length is 0 then throw new Error '"author" cannot be empty, but may be omitted'
 
         @_rawData.author = author

src/coffee/models/parser_versions/mod_version_parser_v1.coffee

@@ -153,7 +153,7 @@ module.exports = class ModVersionParserV1 extends CommandParserVersionBase
 
         createSlug = (name)=>
             item = @_rawData.items[name]
-            if item?
+            if item? and item.type isnt 'update'
                 slug = new ItemSlug modVersion.modSlug, _.slugify name
             else
                 slug = new ItemSlug _.slugify name
@@ -198,6 +198,7 @@ module.exports = class ModVersionParserV1 extends CommandParserVersionBase
             pattern: recipeData.pattern
             tools:   toolStacks
 
+        logger.debug "adding recipe: #{recipe}"
         modVersion.addRecipe recipe
         return recipe
 

src/coffee/models/recipe.coffee

@@ -107,7 +107,7 @@ module.exports = class Recipe extends BaseModel
                 @_produces[stack.itemSlug.qualified] = true
                 @_produces[stack.itemSlug.item] = true
 
-        return @_produces[itemSlug.qualified]
+        return @_produces[itemSlug.qualified] or @_produces[itemSlug.item]
 
     requires: (itemSlug)->
         for stack in @input