Added Coverage through Istanbul and Coveralls integration with Travis.ci
Adjusted code coverage requirements due to experimental state of this project
Add Coveralls.io stats to README.md
Merge pull request #15 from inventid/feature/coveralls

Feature/coveralls
Use actual image refs

Their own github repo gives the wrong example unfortunately :(
Create scopes and use them for hasMany relations
Add tests for anonymous scopes
Merge pull request #16 from inventid/feature/model-collection-scopes

Add collection scopes
Replace dynamic properties by dynamic attributes

Dynamic properties haven't really proven useful, and they might make more
sense for model attributes
Add lazy dynamic property
Use dynamic attributes in relations