added thermometer, resized .value-sublabel, added indicator

- added thermometer
- resized .value-sublabel
- added indicator
- added .negative, .positive .neutral class. Sentiment text and thermometer will change color depending on which class it appends.

**Note**: Client provided only red thermometer.png but they're asking us to display green/grey/red. I've used CSS3 filter to hack it. All but IE supports this function