bumped version to 0.4.1
Merge branch 'release/0.4.1' into develop

* release/0.4.1:
  bumped version to 0.4.1
bugfix: usage docs were conflicting with tests
bumped version to 0.4.2
Merge branch 'release/0.4.2' into develop

* release/0.4.2:
  bumped version to 0.4.2