Visual fixes in login page.

 * Remove uppercase class from all 3 login buttons
 * Add hover effect in login buttons
 * Use bootstrap classes in login buttons
 * Inputs for username/password use bootstrap classes
Add dropdown mockup
Fix spacing
Fix line on player list
Add favicon
Increase title size in session/create view and create space between remember me checkbox and paragraph
Merge pull request #265 from dionyziz/favicon

Add favicon
Merge pull request #259 from dionyziz/player_list_line

Fix line on player list
Remove divider from user menu
Merge pull request #258 from dionyziz/drop_down_mockup

Add dropdown mockup
Merge pull request #266 from pkakelas/login_visual_fixes

Login page visual changes
Merge branch 'game_json_cli' of github.com:dionyziz/endofcodes into game_json_cli
Remove unfinished feature
Merge pull request #275 from VitSalis/game_json_cli

Game json cli