Update SpellView.coffee

Fixed issue #1950 so attack defaults to enemy if player has findNearest or findNearestEnemy
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
Merge branch 'master' into production