Added support for '+' key
Fixed failing spec due to deprecated simulateEvent in mootools/mootools-runner. See https://github.com/mootools/mootools-runner/commit/d27eedcc7accbca5daea23e7d04e16e4010ce7a3
code cleanup.
Merge branch 'fix-keyboard', closes #1201
Merge remote-tracking branch 'upstream/master'

Conflicts:
	Source/Interface/Keyboard.js