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(readme): dependencies badge
chore(user): tiny cleanup in findTask function
Implement "Change username" feature
chore(bailey): gaymerx meetup
fix(password): case-insensitive emails in forgot-password
fix(bailey): updated wording to save vicky
refactor(groups): cleanup leave-group code
fix(quests): when leaving group, if leader or quest.leader is leaving,
re-assign to most senior member. #3709
feat(jade): split file to be used on mobile
feat(directives): move directive to be used in mobile to habitrpg-shared
fix(package.json): relax and update bower version
fix(quests): don't reset quest progress when world boss defeated
fix(quests): show completion dialog
fix(dilatory): tmp fix to prevent high damage #3712
fix(quests): prevent very high damage
Revert "fix(quests): prevent very high damage for all quests" (@lemoness
@deilann - now it's just world boss, capped 900)

This reverts commit 89369e21a3daf9c6b69e26487b96a4e061d1d09e.