v0.3.1 Release

v0.3.1 Release. Biggest change from v0.3.0 is the introduction of unit tests for summer, and then the implementation of coveralls to track code coverage.

What's Changed

• v0.3.0 release by @robertdstein in #63
• Add Summer CI by @robertdstein in #64

Full Changelog: v0.3.0...v0.3.1