Add repository field to package.json
Add documentation regarding Required constraints
Merge pull request #13 from fixe/patch-2

Add repository field to package.json
Merge pull request #15 from seegno/bug/constraint-required-list

Fix required constraint behaviour in constraint lists
Merge pull request #14 from fixe/patch-3

Add documentation regarding Required constraints
- updated .travis.yml config for node env
Added support for Collection with Assert
Merge pull request #16 from seegno/feature/collection-assert

Added support for Collection with Assert
- added changelog for 0.6.1