Add dependency injection in People related activities

Feedback is welcomed!
Add "image picker" for person
Add DI plumbing and initial work for profile picture
TimePicker for DisplayPod and EditPod

Conflicts:
	src/main/java/com/thoughtworks/carpods/UI/pod/DisplayPod.java
	src/main/java/com/thoughtworks/carpods/UI/pod/EditPod.java
	src/main/java/com/thoughtworks/carpods/data/Pod.java
Revert "TimePicker for DisplayPod and EditPod": tests pass and deploy to simulator works with revert

This reverts commit dc8ddfd30180a1f74848e72813e907168df8dc5b.
CKB - merge from master, fix DI issues in new files
Change ViewCast to be a static helper
Few tweaks to merge to master
Add profile picture "picker" and dependency injection

Trying out Dagger as a DI framework for us!