Pyham

FIX:
- Remove unnecessary files from git repo
- replace outdated nosetests -> pytest as test running

IMPROVEMENTS:
- Improve handling of HOG IDs in pyham. HOG objects use "hog_id" or "og" attribute
from orthoxml to show objects, and also include the taxonomic range.
- LOFT attribute will be loaded for gene elements if assigned in orthoxml.


**Full Changelog**: https://github.com/DessimozLab/pyham/compare/v1.1.11...v1.2.0

What's Changed
* added quoted_node_names option to taxonomy class to fix newick import error by ethanbass
* Fixes parsing problem with directly nested paralogGroup nodes in orthoxml by alpae
*
New Contributors
* ethanbass made their first contribution in https://github.com/DessimozLab/pyham/pull/8