Camera improvements.

According to the sr200pc10.c kernel driver, our camera does not support the Solarize, Posterize, Whiteboard, Blackboard and Aqua effects. Let these effects be removed so that they do not show up in the camera app to be labelled as broken.

Also, the driver allows brightness/exposure settings from levels 0 to 6. That's why the current settings only allow exposure to be set from -2 to 4. These were changed to match the driver's levels and the default was set to a median value of 3.

Support for ISO_HJR and ISO_800 were removed since they are also unsupported.

Added additional zoom ratios which allow zoom up to an optical level of 3x.