Merge pull request #5 from sphaero/master

import fixes for modules
Merge pull request #6 from sphaero/master

multiple fixes to examples and added run_once method to ZOCP
Merge pull request #7 from sphaero/master

clearer logging and separation of ZRE & ZOCP
Merge pull request #9 from sphaero/master

Object registering  methods
Merge pull request #10 from sphaero/master

fixed wrong literal
Merge pull request #11 from sphaero/master

refactor blender addon
Add string edit widget
Merge pull request #12 from fieldOfView/feature_urwid_string_widget

String edit widget
Fix crash when user clears float or int widget while editing
Merge pull request #13 from fieldOfView/fix_empty_int_float_widget

Fix crash when user clears float or int widget while editing
Fix syntax for python 3.2
Merge pull request #14 from fieldOfView/fix_python3.2_syntax

Fix syntax for python 3.2
Do not emit value until pressing enter or loosing focus
Fix limits in percentage widget and switch directions in float widget for consistency
Merge branch 'master' into feature_enter_to_emit
Change methodname to on_focus for consistency
Change header text when switching between nodes
Fix removal of last node
Fix syntax for Python3.2
Merge pull request #16 from fieldOfView/fix_minor_urwid

Minor urwZOCP fixes