Added Sphinx docs
Merge pull request #30 from Markush2010/docs

Added Sphinx docs
Unified naming for parser productions
Add link to docs to readme
Merge pull request #31 from MarkusH/doc-update

Unified naming for parser productions
Migrated from a single ast.Expression to an ast.Module to favor debugging and Python syntax feature

This works in a way that all output is appended to a list inside a
template rendering context and joined into a single string in the end
before it is returned.
Removed dead code