Don't load jQuery twice

NOTE: Loading jquery-ujs twice causes the data-remote links to POST twice - resulting in an 'unfollow' immediately after a 'follow'
Remove protips#queue and anything associated with it

These are leftovers of https://github.com/assemblymade/coderwall/commit/82359ea5d0919af68439d0a7579bdf110c496e31
Fix JS related issue in ProTips pages

Move follow-widget UI logic into common file, run initializeProtip() at end.
Remove ProtipView.js.coffee, correct newlines

The file isn't being used anywhere.
Merge pull request #272 from rohitpaulk/fix-follow-buttons

Fix follow buttons [#482]