* Flesh out the formerly incomplete ItemSlug class
* Convert all uses of text item slugs to use ItemSlug
* Move the ItemSlug class under models where it properly belongs
* Avoid the use of `slug` as a local variable or item attribute
wherever possible to avoid confusion between various kinds of slugs
* Merge the InventoryParser class into the Inventory class as it is
unlikely to need to support multiple versions
* Simplify the ModPack/Mod/ModVersion interfaces by replacing the use
of various "helper" methods with equivalent use of more generic
methods
* Update the various methods of ModPack/Mod/ModVersion to be able to
work with qualified or unqualified ItemSlugs
* Remove the unused BaseCollection class
* Add tests for ItemSlug and update all other tests to reflect
all the other changes
* Create a nascent version of the mod detail page
* Make the slug mandatory for Mod instead of name, and load the name
from the data file
* Make the Feedback view universal on all pages
* Refactor the use of mod pack to have a single global object at the
router level which is shared between pages. Further, make this one
object load itself immediately and have it automatically load any
activated mod version
* Refactor the use of Storage related to mod pack versions into the
router as well.
* Add trace logging back in for events, but allow individual classes
to suppress it (as opposed to actually supressing the events)
* Fix a bug in ModVersion.eachItem where it would suggest so-called
items which are merely registered slugs without associated items
* Tweak style of quantity label in output box to be more visible
* Move data files for all mods under a directory for the specific
version of the mod
* Add a `silent` property to the base model to prevent models which
shouldn't be observed from emitting events
* Change the term "itemSlug" to just "slug" across the board
* Change all models so that they don't require their parent in their
constructors and so that they don't automatically add themselves to
their parents lists
* Remove a bunch of unnecessary event triggering
* Tighten up access to various lists of children across all models
* Refactor the guts of the V2 parser into an abstract base class so
it can be used for other parsers in the future
* Remove a number of unused methods
* Changed "version" to "dataVersion" in data format
* Changed the "modName" and "modVersion" fields on the ModVersion
class to remove the "mod" prefix and changed the data format to
match
* Change the Stack class to use the itemSlug instead of the item
itself
* Update the ModVersion and ModPack classes to include methods for
recording a correspondence between slugs and names. Update code
which displays items from stacks to use these methods to determine
display names.
* Add a reference from Recipe back to the item it creates