inital directory structure
added modular_group.nb
added notebooks
modular_group: removed display of ford circles again
created animations for exponential transformation of tessellation
Combined moebius and exponential transformation animation, refs #4
animated exponential transformation, fixes #4
basic document structure, fixes #5
intro moebius transformations part 1, refs #6
intro moebius transformations minor update, refs #6
added initial bibliography
further bibliography entries, removed indexing commands again
added section about generalized circles, fixes #12
added experiments with euclidean algorithm
minor changes
added lemma about group generators for möbius transformations
added into for moebius transformations revealed
minor restructuring
export for tessellation under exponential transformation
fixed minor errors