Add: An optional Boolean flag to collect_data_files to allow collection of .py
       files, for use with programs that inspect the filesystem to find the names
       of modules to import.
Add: A hook which includes markdown's hidden extensions imports.
Docs: PEP8 cleanup.
      Added documentation for additional parameter.
Add: Test for the markdown hook.
Add: Test case for PyQt4.QtWebKit.
Add: Test case and hook to fix failures in loading plugins (QtWebKit) from
       a .ui file.
Merge pull request #95 from bjones1/misc

Allow collection of .py files as data files, for programs that inspect the filesystem then dynamically import plugins.
Add a hook for markdown to expose its hidden imports.