Added document on new (or enhancing) markup in the IPython Notebook, and the start of the Arnold cat map
Rotated square calculated and drawn in Arnold
Changed name enhancing->new_markup. Added section on external references
Added bibliographic references section
More examples of biblio use
Details of Python implementation of reference list as a dictionary
Working to find starting point. Now will factor so that also returns the *number* of the side of the polygon
Added bibserver reference
Added mapping polygons
Refactored line segments to use 'start' and 'end' instead of 'p0' and 'p1'