Clean-up, document and rename some attributes.

• Structured analysis file to better find attributes, and documented some of the attributes
• Added one error test case for a role being already declared (see Errors and ErrorsLeft)
• Removed unused attributes
• Renamed attributes to better match their purpose
• Effectively removed LeftDirection from analysis, as it is now parsed as an inversed RightDirection (as we do not have round-trip parse-print-parse tests, this is not a problem)