OZP-64: Removing extra web.xml files
OZP-64: Preferences API unit tests

Creating OWF.Comms.Constants to store rpc service names
Creating unit tests for new preferences API
	getPreference
	setPreference
	deletePreference
Creating unit tests for old preferences API:
	getUserPreference
	setUserPreference
	deleteUserPreference
	doesUserPreferenceExist
	getCurrentUser
Revert "OZP-64: Removing extra web.xml files"

This reverts commit ce53ce5f92311b2bb742c91cda3408a107497ee3.
OZP-64: re-adding web.xml
OZP-64: OWF.Util.filterAttrs()
OZP-64: findWidgetDefinitions
OZP-64: OWF.Widgets.findWidgetDefinitions unit tests
OZP-64: getCurrentUser unit tests
OZP-64: Fixing jshint error