Initial Drag and Drop

+ add sortable library
+ add font awesome icon to indicate draggable
+ added styles for draggable
+ made rows sortable, as well as created reorderGame function
Changes

+ Return to original order if POST request fails.
+ Clean up css for visibility of drag handles
+ Simplify way of finding “rank”
update dashboard.styl to make alphabetical
Merge pull request #166 from emoore24/drag_n_drop

#125 - Initial Drag and Drop