WIP: CFD-156 - Quick post form : Show the selected taxonomy in the form

#203 

Showing the selected values:
![selection_021](https://cloud.githubusercontent.com/assets/7369740/5068138/686d69f0-6e53-11e4-94d5-7171ebed3974.png)


Deleting a value from the selection upon clicking on the blue "X":
![selection_022](https://cloud.githubusercontent.com/assets/7369740/5068141/78ad902e-6e53-11e4-9432-3c4f6efd3772.png)

We should use the SASS version, not CSS.