Merge tag 'v1.3.3'

1.3.3
Allows unknown properties to be saved for non-strict models

See https://github.com/strongloop/loopback/issues/199
Merge pull request #77 from strongloop/feature/lb-issue-199

Allows unknown properties to be saved for non-strict models
Bump version
Merge branch 'release/1.3.4' into production