figured out directive controller scoping for testing
add state changes on sorter directive click

things left to do:
 - add an up/down arrow to the active directive ($watch the offerOrderState to change a local isActive variable, use a tranclucent template with 2 span fields (one for each arrow), both with ng-show"isActive" but one is active when isAscending the other not)
 - add a sorter to the offers list that uses this state