Added an option in the cmake build to disable wxWidgets. To use add «-DDISABLE_WX=1» to the cmake configuration command. Also fixed the nowx build.
Set scons build to autodetect OpenCL by checking for both the library and header instead of having an option. Unfortunately there probably needs to be a path variable that can be set to the location to look for the headers. For example on Ubuntu with nvidia, the headers are located in /usr/include/nvidia-current instead of /usr/include, and hence not found by scons.