relax SVN archive

The about device context is now embedded in a wx.ScrolledWindow embedded in the wx.Frame object.

This will allow about dialogs that can be scrolled.

Removed some trailing whitespace.

Shifted the about_relax draw_title() method to the base class.

The about dialogs are now destroyed rather than being hidden, as they are generated now on the fly.

Fix for the about relax dialog - a no longer extant arg was being set to the offset method.

The about dialogs are now created on the fly.

This should save some start up time.

The offset variable is now initialised in __init__() in the about base class.

Shifted some of the about relax methods into the base class.

The sample_scripts and scripts directories are no longer parsed for the API documentation.

Epydoc docstring fixes.