core.py and plot.py docstrings
Merge pull request #24 from zblz/docstrings2

core.py and plot.py docstrings
core.py coding
update astropy_helpers
fix docstring reference in See also section
use astropy hack to import astropy_helpers when building docs from docs directory
Skip tests that require optional dependency
Merge pull request #26 from cdeil/emcee_optional

Skip tests that require optional dependency
include examples in tutorial
Merge pull request #27 from zblz/crab-tutorial-docs

include examples in tutorial
use same data for tests and examples, include plots in test
remove setuptools_bootstrap
use batch matplotlib backend
default theme for rtd
remove travis and readthedocs badges from documentation
update coveragerc
core and utils docstrings
accept quantities or array, store quantities
fix tests to compare values, not quantities
use quantities in ElectronOZM synchrotron

finish ElectronOZM conversion