Updated Russian translation (thanks to toiffel).
Fixed cursor not being visible in some cases after file is loaded (ref #116).
Fixed wrong tab activated on OSX after using New file in some cases.

This is caused by two PAGE_CHANGED event for the notebook triggered
when the current tab is not the last one (in wx2.9.5+). This could lead to
a crash if the incorrect tab is closed (ref #89).
Fixed 'control' check on OSX that changed with wx2.9.2+ (ref #89).
Added line copy/cut for Ctrl-C/Ctrl-X with no selection.
Added handling of Ctrl-Home and Ctrl-End on OSX (ref #89).
Fixed launch command for Corona debugging on Windows.
Updated About screen to be more configurable and flexible.
Updated CHANGELOG with recent changes.
Updated Monokai color scheme to fix current line color.