VIM-265 Add window split commands

Conflicts:
	src/com/maddyhome/idea/vim/VimPlugin.java
	src/com/maddyhome/idea/vim/ex/CommandParser.java
Set isChange to true when calling deleteRange from ctrl-w handler
Add test for VIM-569 fix
VIM-569 Fixed <C-W> when the caret is at the end of a line
Added Dathan Bennett to the list of contributors
Removed unused declarations
Cleanup
VIM-770 Close the current tab on :quit instead of all tabs with the current file
Added salaam to the list of contributors
Merge branch 'vim-265'

Conflicts:
	AUTHORS.md
Compatibility with builds 133+ / IntelliJ 13+
Merge remote-tracking branch 'upstream/master'
update plugin SDK
update plugin SDK