renamed bot_test.py to test.py
wrote skeleton for GnuPG, and unit tests (#15)
fixed GnuPGTest unit test bugs (#15)
made GnuPG exporting keys work (#15)
made import keys test pass (#15)
made decrypt test pass (#15)
made encrypt test pass (#15)
made has_secret_key_with_uid test pass (#15)
made gen_key test pass (#15)
minor change because of removing python-gnupg (#15)
update readme because I renamed bot_test.py to test.py