Added some documentation

docs/index.rst

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+.. _index:
+
+Paperless
+=========
+
+Scan, index, and archive all of your paper documents.  Say goodbye to paper.
+
+
+.. _index-why-this-exists:
+
+Why This Exists
+===============
+
+Paper is a nightmare.  Environmental issues aside, there's no excuse for it in
+the 21st century.  It takes up space, collects dust, doesn't support any form of
+a search feature, indexing is tedious, it's heavy and prone to damage & loss.
+
+I wrote this to make "going paperless" easier.  I wanted to be able to feed
+documents right from the post box into the scanner and then shred them so I
+never have to worry about finding stuff again.  Perhaps you might find it useful
+too.
+
+
+Contents
+========
+
+.. toctree::
+   :maxdepth: 2
+
+   requirements
+   setup
+   utilities
+   changelog