fixes #767 - actions-mappings.xml are now control client side keyboard
mappings too.
Actions are serialized as JSON as part of HTML emulation.
Keyboard names relies on dojo/keys names:
http://dojotoolkit.org/reference-guide/1.10/dojo/keys.html
Renamed ESC -> ESCAPE, PAGEUP -> PAGE_UP, PAGEDOWN -> PAGE_DOWN
Merge branch 'master' of https://github.com/openlegacy/openlegacy.git