Integrate android build

dirty commit log but it was needed...

ref: #33

related posts:
 * https://groups.google.com/d/msg/adt-dev/lrOhep0CkB8/oUHjpYiQ3PcJ
 * https://groups.google.com/forum/#!msg/adt-dev/-CDoq22C-aU/PWzBELF1794J

thx: @zaki50