Adjust MSVC detection/support in CMakeLists.txt

[Spudz76]

• Add vim modeline to end of file to help ensure correct indents (no tabs, 4 spaces)
• Patch whitespace where indent did not match above rules
• When MSVC, protect -std=c++11 from being added to CUDA_NVCC_FLAGS (avoid warnings during compile)
• Add /LTCG to global linker flags (avoid "restarting linker" warning during link of openssl/hwloc deps)
• Add also /INCREMENTAL:NO /OPT:REF to shared linker flags for smaller EXE (unused references removal)
• Add /Ox /GL /EHsc to compiler flags to generate output compatible with above new linker flags

[Spudz76]

I have been using these patches on my own "daily driver" rigs for over 6 months, pretty sure they work nice. Mostly makes a handful of the pointless build warnings go away, does not appear to cause any problems.

[psychocrypt]

Could you please remove the white space changes in this PR. Please do never mix formatting of a full file with any improvements.
If you add a separate PR where all white spaces changes are in I can check it without doing any test. Also there is no need to mentioned white space changes in the change log but changing linker flags are important.

[Spudz76]

refactored