Now using 5 environment variables to identify build prereqs VCE.

$(AMDAPPSDKROOT)   : Path to the AMD OpenCL APP SDK
$(AMDMEDIASDKROOT) : Path to the AMD OpenCL Media SDK
$(ATLINC)          : Path to the ATL headers
$(ATLLIB32)        : Path to 32-bit ATL libraries
$(ATLLIB64)        : Path to 64-bit ATL libraries
Incredible quality improvements using CBR OpenVideo.