added vec2f widget
fixed register_vec2f method in zocp
Merge pull request #35 from sphaero/master

added vec2f widget
added start method to examples
Merge branch 'master' of https://github.com/z25/pyZOCP
Merge pull request #36 from sphaero/master

Merged
Merge branch 'master' into feature_subscribe

Conflicts:
	examples/simple_node.py
Update examples with Pyre start() method