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