Remove old main module

This is no longer used, being replaced by the classes and the collective
__init__ module for the package.
Move all classes down one level

With the removal of the main module, all classes can now live in the
root of the main package.
Updates to migration script

Additional calls are now made to clean up old tools/ and designer/
resources, as well as simplifying the try/except pattern.
Updates to tools

Makes adjustments for the newer directory structure and ease of use.
Move tools directory up to root of repo

This directory is not actually installed for users as part of the
awesometts package, so the root of the repository is the more logical
(and accessible) place for it.
Speed support for Mac OS X

Enables the user to specify playback speed when interacting with the Mac
OS X say command (passed via the '-r' parameter).