Merge pull request #46 from kbarbary/master

model.summary() -> model._headsummary(). Closes #43.
add coverage testing
bug in .travis.yml script
add ah_bootstrap.py script from v0.4.3 astropy-helpers
update to newer ez_setup.py
convert setup to use astropy-helpers
finish updates to setup.py to use astropy helpers
fix broken .travis.yml
PEP8 fix
fix .travis.yml... again
update to new config system in astropy>=0.4
pep8 fixes
add config changes to changelog
really really good-looking flat badges
add pypi badge to README
add maxcall kwarg to nest_lc()
update get_ebv_from_map() for astropy v0.4
pep8 fixes