check agains basestring instead of str to allow for unicode strings as well
Reworked and cleaned up initialization routine. Rewrote the check for symmetry to be more efficient by searching for specific symmetries first.
Changed test for congruence group to a test for Gamma0
Removed imports of Permutation_class
Fixd problem with cusp at infinity
Fixed a lot of small bugs
Fixed the evaluation routine
Added options for using Farey symbol coset-reps in pullback.
Fixing routines for plotting in the unit disk model
Merge branch 'master' of github.com:sehlen/psage