Improved speed and status messages.

Results show up as they come in and a user can see how far the query has progressed.
Also, limited friend query to 50 friends.  Taking random samples or systematically
different ones may prove more interesting.
Merge branch 'master' of https://github.com/mihaibulic/MiRec

Conflicts:
	src/com/mihai/mirecs/MainActivity.java
	src/com/mihai/mirecs/data/FacebookRecommender.java