added .travis.yaml
...in principle, updated hgrc....
added configuration tests / py.test ignore stuff
minor update... included subprocess in setup.py no matter what
specwarning bug fix (?)
units has an option for unrecognized untis
added means to ignore units if no valid units are available
fix in as_unit - central freq not required for all conversions
parinfo -> as_Parameters fixed to use kwargs instead of relying on order of
arguments.  However, according to the git history of lmfit-py, as_parameters
(and therefore the lmfitters within pyspeckit) *never* worked an should
*always* have crashed.  The fact that they didn't is perplexing and deeply
disturbing.
runtests -> run_tests (no wonder they were failing...)