Merge pull request #2 from felixb/master

Misc changes from felixb
Update README
Updating readme
Facebook SDK 3 jar
Updating ignores
Refactoring method parameter to avoid null
Small bugfix
Crop pictures

- Crop all pictures to squares
- Add option to turn cropping off
Improve readme
Updating facebook jar
NPE bugfix
Version 1.41
add build.xml