mBuild 0.10.8

Features

Support entry_point plugins for mbuild package distributed by conda (#754)

Bug fixes

Fix bug when cloning a Compound with Box (#753)
Fix CIF module import statement, add more unit tests (#760)
Include missing transpose of CIF box_matrix (#767)
Fix command typo in packing.py (#761)

Maintenance

Update mBuild document link in README (#757)
Replace instances of manual degree/rad conversion with numpy functions (#764)