FFJ-15 FFJ-16 equals/hashCode, toString, serializable
prepare release 2.1.0
Merge branch 'release/2.1.0' into develop
Add settings for Travis CI and Coveralls

Fix .travis.yml

Setup Coveralls

Reduce test log output

FIx configuration for Coveralls

Update URL of build status to Travis CI

Fix settings for Coveralls

Fix settings for Coveralls