Refresh of content assist support

New support for callback functions in jsdoc.  Eg--

    /** @param {function(str:String)} cb */
    function func(cb) { }
    func(function(str) {
	    str.|
    });

Content assist at the | will provide string-like 
proposals.
Merge branch 'master' of ssh://git.eclipse.org/gitroot/orion/org.eclipse.orion.client
Bug 410852 - [Shell] exception when invoking type's stringify service
add emacs upper/lower/capitalize actions. shared movement code.
Merge branch 'Bug409768' of github.com:gabrielluong/orion.client into Bug409768