Lossless-ly optimize JPG image

Ran "jpegoptim --strip-all" on the image.

Size went from 28142 bytes to 11433 bytes (59% reduction).
Lossless-ly optimize GIF image

Ran "gifsicle -O2 -b" on the image.

Size went from 3996 bytes to 2960 bytes (26% reduction).
Lossless-ly optimize PNG images

Ran the following on these images:

- pngcrush -q -rem gAMA -rem alla -rem text
- optipng -o9 -q
- advpng -z -4 -q

Sizes went from:

- 6153 bytes to 2077 bytes (66% reduction)
- 6413 bytes to 2216 bytes (65% reduction)
- 1789 bytes to  643 bytes (64% reduction)
- 7383 bytes to 3423 bytes (54% reduction)
- 4765 bytes to 1555 bytes (67% reduction)
- 5197 bytes to 1730 bytes (67% reduction)
- 4765 bytes to 1555 bytes (67% reduction)
don't show GuildGems on the party tab
feat(jshint): add initial config

This initial config mostly documents existing code style
by relaxing multiple options that are turned on by default.
feat(readme): dependencies badge
chore(user): tiny cleanup in findTask function
Hide task control buttons during editing
API rejects spell cast if not enough mana

Fix #3493 “API does not validate if user has enough mana”
Update spell cast test to ensure user has mana
Update API Parameter documentation for Equip call

the function that is called actually expects different values than specified in the documentation.

This is related to #3525.
The API itself works, it just does no validation of the input and the documentation is wrong, which is why I used it wrong.

Having some kind of validation would probably still a good idea.
fix(i18n): use strings
feat(i18n): support british english
chore(migrations): cleanup unused json library, added in 999669a2, not removed in cbe23f638a
Merge pull request #3554 from Gaelan/dry_routes

DRY up src/routes/pages.js.
Merge pull request #3190 from denis-sokolov/jshintrc

feat(jshint): add initial config
Merge pull request #3540 from vIiRuS/patch-1

Update API Parameter documentation for Equip call
Add Bountysource badge to README

Because you have some open bounties, we thought you might want to display this badge in your README!
refactor(.hero-stats): restyle status meters

Add text to icons to clarify purpose of each bar
Tidy up tooltip behaviour
Aesthetic changes
refactor(avatar.styl): add text shadow to lvl label