Update setup.py description and classifiers.
Update setup.py description and classifiers.

ptcrypto/pycoin,Pan0ram1x/pycoin,zsulocal/pycoin,Magicking/pycoin,Magicking/pycoin,XertroV/pycoin,Bluejudy/pycoin,Treefunder/pycoin,Tetchain/pycoin,Tetchain/pycoin,mperklin/pycoin,antiface/pycoin,lekanovic/pycoin,shayanb/pycoin,gitonio/pycoin,shivaenigma/pycoin,Kefkius/pycoin,pycoin/pycoin,ptcrypto/pycoin,thirdkey-solutions/pycoin,XertroV/pycoin,shivaenigma/pycoin,pycoin/pycoin,Pan0ram1x/pycoin,lekanovic/pycoin,moocowmoo/pycoin,zsulocal/pycoin,antiface/pycoin,tomholub/pycoin,tomholub/pycoin,gitonio/pycoin,richardkiss/pycoin,richardkiss/pycoin,shayanb/pycoin,Bluejudy/pycoin,mperklin/pycoin,moocowmoo/pycoin,Kefkius/pycoin,Treefunder/pycoin,devrandom/pycoin,thirdkey-solutions/pycoin,devrandom/pycoin