Fix and update admin panel JS
UI changes

* Better close buttons - removed misaligned background
* Make success messages slightly darker
Rewrite game list display
Improve game list table
Confirmation for unregistering games
Modal manual registration form
Shorter animation duration (500 -> 250)
Form changes, remove logout confirmation
Add tagging to uncaught exceptions. (implements issue #17)
Bump version 0.3 -> 0.4.
Merge branch 'ui' of https://github.com/lethosor/dfterm3
Bootstrap
Initial UI rewrite: Add navbar, minor css changes, update login screen

Note that the layout in some places still has issues, especially the playing interface
Update buttons and alerts
Fix playing login, adjust box shadow
Keep alert close buttons from trying to submit forms
Update README.md to mention git submodules, we have one now.
Merge branch 'ui' into canvas