Update README.md
add facebook-3.0.2.aar
update README.md
remove crouton-1.8.1.aar. it is just a jar that is available in maven central
add android-betterpicks and drag-sort-listview
Merge remote-tracking branch 'upstream/master'

# By Goddchen
# Via Goddchen
* upstream/master:
  add android-betterpicks and drag-sort-listview
  remove crouton-1.8.1.aar. it is just a jar that is available in maven central
  update README.md
  add facebook-3.0.2.aar
  Update README.md