Update INSTALL
Update INSTALL

Replaced all references from 'Bitcoin' to 'ProtoShares'
bitshares/bitshares-pts,ddombrowsky/radioshares,ddombrowsky/radioshares,bitshares/bitshares-pts,bitshares/bitshares-pts,ddombrowsky/radioshares,bitshares/bitshares-pts,ddombrowsky/radioshares,bitshares/bitshares-pts,ddombrowsky/radioshares