Cpp: Document use of cmake
examples: Add spaces to Makefile example
Cpp: Correct 64-bit hyphenation
Cpp: Correct Windows path
limitations: Add OmeroCpp build failure on Windows
Cpp: Additional cleanup of options and sectioning
Cpp: Document gtest and LLVM
Cpp: Correct cmake options
Cpp: Spelling changes
Merge pull request #898 from rleigh-dundee/cmake

Cpp: Document building with cmake