Upgrade dependencies and remove workarounds

The old version of beautifulsoup4 was too eager to close stray tags
and a workaround was needed to ensure that embed tags fork correctly.
This is no longer an issue with the latest release.

Remove stray tags added by BeautifulSoup

BeautifulSoup's parser is sometimes to eager to close tags, which produces output like
<embed></embed>, which some HTML validators fail to accept. This release removes
the stray tags if found.

Fix for unicode encoding of the output file

Fixing problems with unicode encoding

First major release

The code is now properly structured, installable via setuptools, with proper tests and CI.

Initial release

First version of the script.