add the WxProgressBar
Turn off the text label for the progress bar for now.
add the WxForm component
Remove word wrap from the Label.

It needs more thought about how it will interact with constraints
before adding it as a supported feature.
Remove word_wrap from the Label.

It requires more thought about how it will interact with constraints
before it is added as a supported feature.
Add the WxLabel component
add the WxSpinBox control
add the WxSpinBox to the factories
update the docstrings
Fix the way Session initialization arguments are passed.
Fix enaml-run.
Add a SessionHandler class and make everything work with it.
Actually commit session handler class code, add utility class method to Session
Bring enaml-run up to date.
Change the way that SessionHandler works to reduce the chance of argument name collisions.
A bunch of refactoring based on actual use cases.
Missed a file.
Fix docstring.
And an even better fix.
Add simple single session app, add wx support to enaml-run.