Fix extra comma warnings.
Prevent attempts to handle unknown event types from crashing. Fix #200.
Handle double-click events.
Remove unused and unnecessary methods.
Fix a bunch of warnings about destructors.
Fix tons of type conversion warnings and use size_t/off_t universally.
Fix uninitialized variable problems.
Introduce HSSRgb::toQColor.

Resolves some implicit floating point to integer conversion warnings.