Move frontends to sub-package and misc cleanup.
Misc cleanup
Add separate installation page to docs
Rename test files to snake_case (PEP8)
Misc PEP8 and Python 3 fixes
Update iminuit/_libiminuit.cpp
Use absolute import as reported by PEP8
Add Python 2 / 3 compatibility file
Update .travis.yml
Another Python 2 /3 fix
Make setup.py Python 3 compatible
Add test for Python 2.6 on travis-ci
Merge pull request #90 from cdeil/issue-90

Follow PEP8 in module naming