Miscellaneous observations

[mirh]

• fix link for AMD APP SDK in CMakeLists.txt (ftr there are also direct links for Win)
• AMD APP SDK is already setting $AMDAPPSDKROOT. Check and copy that into $OPENCL_ROOT
• add a win64 configuration?
• add binaries in release section (at least for windows, most are too noob to run cmake .)

• define CL_USE_DEPRECATED_OPENCL_2_0_APIS, so to avoid tens of clCreateSampler, clEnqueueTask and clCreateCommandQueue warnings (at least with AMD SDK, and at least if keeping this 1,2 is desired)

  situation might be different for others sdk tho

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Also, these are my results:

• HD 7750 17.12.1 Windows 7x64 driver*
• AMD E-350 (HD 6310) on.. Well, 15.12 fglrx driver and 15.9 icd on Manjaro Linux 17.1 (kernel 4.14)
• Same hardware but Windows 7x64 with.. let's just call it 16.101.2901 with 15.11.1 icd

Also also, is it normal for Transfer bandwidth (especially for enqueueMaps) to be so aleatory?