Changes on 0.2.0 since 0.1.11

* Now builds under GTK3
* Revamp of Preferences, including ability to change keyboard accels.
* Option to hide mouse cursor on input
* Fixed issue with 'ctrl-shift-c' accel sending 'ctrl-c' to terminal.
* Fixed handling of multi-file input on -e/--command (eg -e foo *.txt)
* Fixed issue where initial geometry is affected by hidden/shown UI elements.
* File->Quit now replaced by safer "File->Close Window"
