add utility mixins into mixins directory and remove dojox references
remove unused variable
add a store mixin
improve doc and simplify API
use emit API for events
doc + ability to know which properties have been invalidated + even on refresh
make event name more obviously talking about selection
make sure store mixin is leveraging _Invalidating, raise an event on store error and fix an index bug
remove some bases classes that anway comes from the receiving class. Update doc to mention that.
remove unused field
fix access to store
add a new mixin extending the store mixin and that adds auto mapping capabilities
add tests for the new mixins utilities
test cleanups + add store test
fix & improve test
adapt test to previous lib commits.