contact_map 0.7.0

Contact Map Explorer 0.7 adds the ability to do differences between maps that don't include exactly the same atoms/residues. It also includes significant cleanup of the API.

API Breaks:

• ContactMap has been removed; in 0.8 ContactFrequency will be renamed ContactMap. See #82 for more.
• ContactObject.contact_map is now private (._contact_map)
• ContactFrequency.frames removed, as well as the frames option in its initialization.
• Several functions related to atom slicing have been moved. See #87 for details. (It is unlikely that anyone was using these.)

New features

• Allow mismatched ContactDifference (#77, #95)

Miscellaneous improvements

• Enable binder in readme and docs (#92, #93)
• API cleanup: private ContactObject._contact_map; remove frames from ContactFrequency (#91) #api_break
• Remove ContactMap (allowing rename ContactFrequency => ContactMap) (#88) #api_break #deprecation
• IndexManagers for atom slicing (#87) #api_break