Merge branch 'release/v2.0.0' into develop
Add DS_Store to gitignore.
Adding the source prototype to the _super property of the prototype of the destination class can potentially cause an infinite loop.
Merge branch 'master' into develop
Merge remote-tracking branch 'refs/remotes/vejersele/master' into develop

Closes #9
Converted tabs to spaces.
Bumped version numbers to v3.0.0.

This patch is a breaking change.
Swapped to unlicense.
Made a not of v3 breaking changes in the readme.
Merge branch 'release/3.0.0'