Update uk.coffee

Added some translations
A few misc tweaks for the new desert level options.
Disable analytics.users.active
Update SpellView.coffee

Fixed issue #1950 so attack defaults to enemy if player has findNearest or findNearestEnemy
Disabled achievements plugin
Merge pull request #1951 from nemoyatpeace/patch-4

Update SpellView.coffee
Some fixes for desert campaign options.
Fixed #1952 (unsubscribing from specific ladder update emails).
Reverting 1167655f and 30ed0a0e to re-enable the analytics log handler.
Add video tutorials to game guide
A/B Test video tutorial styles
Update Vimeo embed player params
Make spell palette help label a button
Add second kith maze help video
Help videos A/B test results script
Updating help videos

Moving dungeons-of-kithgard to Vimeo
Adding original style for haunted-kithmaze
Help videos A/B results - watched more videos?

Shows which style per-level yielded more additional videos watched.
redesigned the contribute page
Merge branch 'master' of https://github.com/codecombat/codecombat
Help videos A/B results - sub followed?

Shows which level/style combo was followed by a sub purchase.