Add firebase
Switches turn display to use getMark function
Fixes win fill board incentive
Got simple firebase 3-way binding working
Add ignore *.map files
Adds leave button and fixes button alignment
Makes buttons same width
removes controllers.js and controllers.map
Adds ignore *.js
Got basic firebase connection done.

Still need to work on some refinements.
Changed wording from "Waiting for opponent..." to "Opponent's turn"
Change leave button to anchor back to root route
Fix width of leave anchor "button"
Renames div.container to div.buttons-container
Fixes getMark errors when $scope.game is not yet ready
Fixes getTurnId errors when $scope.game is not yet ready
Adds showTurn method to show / hide turn message
Renames show turn to isGameOn
Adds isFindingOpponent to show / hide "Finding opponent..." message
Prevents placing pieces while finding opponent and during opponent's turn