API Catalog: better handling of f8 style tags (labels)

See here:

https://www.dropbox.com/s/k9a0uo43iksqohx/Screenshot%202016-03-17%2015.01.21.png?dl=0

We should handle f8 style tags better by only showing the "value" of the label (the part after the = sign). In addition, if there are a lot of tags we need to scale the card better somehow.

Example in the f8 ui:

https://www.dropbox.com/s/e4rfgf44u9cnohm/Screenshot%202016-03-17%2015.03.44.png?dl=0