Cryptography package is needed as a prerequisite for ZincWebSockets.
Merge pull request #57 from HeSe/issue_28

Cryptography package is needed as a prerequisite for ZincWebSockets.
Issue #58: create CI group to specifiy packages to be loaded by travis-ci for testing ... for GemStone that includes Zinc-WebSocket-Tests ... expect failures since Cryptography project is not up to snuff...yet
add 2.4.4.1 to lineup
Issue #58: no stable version defined in the current Cryptography configuration...
Issue #58: cryptography configuration needed updating, so added stable version while I was at it ...
Merge branch 'issue_58' of github.com:GsDevKit/zinc into issue_58
Issue #53: barring any new sent but not implmented messages, this bug should be fixed .... of course Issue #61 and Issue #62 were opened to implement the missing behavior