DOC: Minor adjustments to README and release instructions
Fix bug where pip -e would not run install_clib

Hopefully closes a long-standing bug where one could not install from source
with ``pip install -e .``
TST: Update travis-ci miniconda
Display fit summary fitting into a reasonable number of columns

This solution seems relatively robust. Many wheels reinvented. Closes #75.
BLD: Allow building of Python wheels with pip and setuptools
TST: Test against OS X and Linux on travis
API: Make LBFGS the default optimizing algorithm
Fix typo in stan args defaults
Release PyStan 2.4.0.1