Merge pull request #62 from ticosax/master

minor doc fix
zope.interface returns Adapters from Global registry first.

Fix sorting to elect local callable at first
future expect instances not classes
give more time for handshake
Merge pull request #64 from ticosax/fix-sorting

zope.interface returns Adapters from Global registry first.
add support for python3 for gevent backend
move test under same folder