Fix argument handling for HMC
Fix corner case when calculating number of digits in summary
Report chain number in progress
DOC: Add notes on how to release Mac OS X wheels
Format sampling progress messages better
DOC: report travis-ci status from master, not develop
Check for user interrupt during sampling and optimization
TST: Add test to verify optimizing example from documentation works

Closes #96
Really 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 .``

This change was previously reverted. Hopefully this version will last.
CI: Build with --quiet on to avoid exceeding travis ci's log limit
WIP reproduce fixedp bug
WIP misc changes, fixedp bug still occuring I believe
Align with develop