refactored a lot of stuff

- removed light service from appdelegate
- made menucontroller an outlet in appdelegate and added menucontroller
  to xib
- moved lightservice methods to menucontroller. remaining methods in
  lightcontroller deal with rest client for jenkins
- Made menucontroller extend from NSArrayController managing an array of
  lightcontrollers
- set managedobject context on menucontroller in xib
- added light service to xib
- set lightservice on menucontroller in xib
- removed managedobjectcontext from lightservice
- moved tests to their appropriate place and fixed any references
- created a MenuController test
made menucontroller prepare its content
added lightsarraycontroller to manage alflights

added to xib
made window appear for 'preferences'
Merge pull request #11 from sboles/refactorToXib

Refactor to xib