Updated HealthText position and made an reversed gradiant for symetric look

I updated the healthtext so it actually is positioned in the healthbar. On the Flipped target frame I made the text always appear from right. So the right-side spacing is always the same on the flipped, just as the leftside is on the non-flipped. 

If you like it merge it, if not tell me what to change ;) 

Screenshots of the changes:
![target crow update](https://cloud.githubusercontent.com/assets/7889925/3314207/6b22c442-f6ee-11e3-87e8-44bf3435d4cd.png)
![target_scanbot_061814_033903_pm](https://cloud.githubusercontent.com/assets/7889925/3314210/6cfbd862-f6ee-11e3-8076-c1bcdf297918.jpg)