mokapot v0.2

The API for mokapot should now be largely stable and feature-complete for the initial release. Further updates toward 1.0 should be bug fixes, tests, and documentation updates.

This release adds full support for protein-level confidence estimates. Additionally, there were major modifications to the Python API: parameters for classes were front-loaded to initialization instead of being distributed throughout the methods. This will hopefully make them easier to use, particularly if the default parameters are suitable.