added data-unit option to display input

[greglbd]

this might be useful, i've seen a few people ask for this feature.

[greglbd]

@mohammadshaker did you use the code as is or make any changes?
can you show me your code and i can try to debug?

If you used it as is, what OS/Browser combination?

[greglbd]

@mohammadshaker someone in our office over here managed to replicate your bug. A fix has been pushed.

[winwaed]

Yes very useful. Will this be going in the next release?
I used this approach: http://stackoverflow.com/questions/18955708/how-to-display-units-with-jquery-knob
but it also suffered from the multiple '%' characters. This is easily fixed with a parseInt() however refreshes also resulted in the colored arc being lost. The fix is to validate the value (which is probably a good idea anyway) - I'll post this change.

[greglbd]

@winwaed, I made a pull request to @aterrien but haven't heard anything as yet....I hope it goes in the next release as i'm using it in some projects.