added functions to top_rep
added to top_rep
local whitehead and index list
quick fix
fixed a typo
Merge pull request #1 from brianmannmath/master

Local Whitehead Graph and Index List
fixed mistakes in index_list and nielsen_classes
Merge pull request #2 from brianmannmath/master

fixed mistakes in index_list and nielsen_classes
fixed a bug in TopologicalRepresentative.nielsen_classes()
Merge pull request #3 from brianmannmath/master

fixed a bug in TopologicalRepresentative.nielsen_classes()
Update imports in core.py

Added import statements to core.py
remove all .pyc files !! and create a gitignore
import AlphabetWithInverses by default in all.py and improve the
docstring in free_group_automorphism