enables osx karma notifications
feat($restmod): adds belongsTo relation and improves url generation.

Url generation is changed to provide a more extensible api based on
method overriding using the same infrastructure than other restmod components.

Closes #20, #25, #26
Breaks hasMany and hasOne modifiers, alias attribute should be replaced by path, removes Builder.setUrlBuilderFactory.
bumps v0.10.0