Allow datacontext to return the real values for concepts and filters

![screen shot 2014-05-29 at 11 06 52 am](https://cloud.githubusercontent.com/assets/2774472/3119075/eb405cf4-e742-11e3-936a-7edb45d6961d.png)

What is returned when a filter is applied.

This will be used to apply styles to the filter display in filter.js 

Signed-off-by: Sheik Hassan <solergiga@yahoo.com>
You mean this part is the problem right? 
`label = smart_unicode(val)`
We could just delete it (and it won't do the assigning) or we can check the first element of the list. If it's not an enumerable/key-base we quit?

Sorry now I think I understand what you're referring to.