Merge pull request #3 from azrdev/master

merge parser for darmstadt by azrdev
Merge pull request #4 from azrdev/master

Darmstadt: added handling of today-only table, fixed bug when using <th>
marburg: skip also text and other non-meal things at top of page
ignore: __pycache__ directories
hannover: improve matching of meal desc.
Merge pull request #5 from mlewe/patch-1

hannover: improve matching of meal desc.
Add debian packaging files/instructions
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