GPU-Z 0.5.3

- Added support for AMD Radeon HD 6790, FirePro V5800
- Added support for GeForce GT 555M, GTX 540M, G315M, Quadro FX 600, FX 2800M, Quadro 4000
- Fixed GeForce GTX 590 release date
- Added support for voltage controllers VT1556, uP6266, uP6218
- Added VDDCI measurement on CHL8228 based ATI cards
- Added capability to show sensors in TechPowerUp OSD Server
- Fixed several crashes and resource leaks