Renamed Mapping to MappingMode
Inlined action handler
Added VimCommandAction base class for simplifying action registration
Added Vim actions index with Javadoc links
Initial version of Vim notation typed characters parsing
Made VisualToggleCharacterModeAction a VimCommandAction
Don't require a custom "Vim" keymap any longer

Keyboard shortcut conflicts aren't handled yet.
Initial version of shortcut conflicts settings