Merge branch 'hotfix/0.2.1.1' into develop
made mu a property so its acts like a variable not a method
packaged using setuptools with working unit tests and data files loaded with pkg_resources.

magnitude_estimation.dat is failing though
working mag estimation load
fixed read me error on pip install
fixed package install (imports failed)
updated readme
fixed travis testing with new package
fixed test_example imports and rare error that would cause an example test to fail due to a previous test increasing planet count
added exceptions for database failing to load
Merge branch 'release/1.0b1.1'