Refactoring on ctrl/svc/drtvs

1. Couple of Specs added.
2. Moved Star Directive into app\star
3. Changed renamed starDirective & starService to starDrtv and starSvc, to match existing convention
4. Moved logoff directive into a separate file from app.js
5. All server calls in ctrl are moved to svcs (issue #26)
6. Minification protection on arguments (issue #49)