inherit parent div size, dynamic update of subtext & barcolor without redraw

[markterrill]

Hi,

There is a bit of a suggested update.
Parent div size: I needed for the knob to be drawn according to CSS size, not the hardcoded size due to the wide range of mobile devices. It's so much easier to detect breakpoints via CSS media and sizing a parent div than detecting every known device and inputing a hard size to ng-knob.
Subtext & barcolor: I've done a tweak to parse whats changed in dynamic options so that elements could be directly updated rather than a complete redraw, this logic could be extended if folk had other attributes they cared about.

Cheers, thanks for an awesome project!

[markterrill]

Interestingly, i just noticed this takes the approach that some people were talking about in #3

It doesn't provide responsive response to window resize, though the logic is there, easily could be copied into the dynamic options and trigger dynamic options on window resize

[markterrill]

I have to say. I added onto the list of demo's in the index html, which brought it to 'knobCtrl13' and its Friday 13th here. Also this is pull #42, my favourite number ;)

[hcabnehca]

Hi I'd really be interested in this improvement. Who do I need to bribe for a merge? ;)

[markterrill]

Do it yourself if no one answers

[markterrill]

Or simply clone mine