Added support for X-Requested-With header
Merge pull request #36 from ilyashuma/master

Added support for X-Requested-With header
Merge branch 'master' into ws

(This is merged in to avoid any other merge conflicts going forward)

Conflicts:
	src/misultin_bridge_modules/misultin_request_bridge.erl
	src/mochiweb_bridge_modules/mochiweb_request_bridge.erl
	src/webmachine_bridge_modules/webmachine_request_bridge.erl