Add global search functionality
Changes from feedback

Fix jshint errors (+4 squashed commits)
Squashed commits:
[0da0d6d] Revert board and card back to original styles
[de28cd8] Clear the results and show a message if the user has not entered a search query
[d2e5c69] Move full results button to bottom right corner
[aa67646] Display the total number of search results (informs user that only partial results are being displayed)
Change style of archived cards in search results
Set a min height on the quick search results
Bugfix: Only debounce fetching results when using quick search
Change handling for archived and closed cards in search views
Fix card pagination in search results
Bugfixes:
 - Reset quick search results when a card is archived / unarchived
 - Fix link to board in full search results page
Merge pull request #30 from smilledge/feature/global-search

Add global search functionality