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.
* Remove V1 of the mod version parser and shift V2 up to be V1
* Add a parser for mod.cg files, and refactor the the mod-version.cg
files to push the appropriate content up to the mod.cg
* Remove the concept of "silent" from BaseModel along with logging
each event as they are fired (which is what really prompted the
need for it in the first place)
* Move use of the Storage class to be completely the province of the
controllers most closely related to models affected
* Convert the ModVersionController to the ModController and have it
take on responsibility for choosing the mod version
* Update BaseModel to support simple accessors for the current state
* Update CraftingPlan to be able to remove uncraftable items
* Implement the Mod model