Format block comments.

tests: fix comparison with None.

Add missing whitespace.

Fix quantity of blank lines after code object.

utils: remove trailing whitespace

Minor change : Link to MSVC14 Standalone

Add the new link to "Microsoft Visual C++ Build Tools" if MSVC14 is not installed.

Fix misspellings

msvc fixes

Fixes : 
- Bad argument name
- Better Python 2 compatibility

Improved support for MSVC discovery

Reindent to avoid raw strings and hanging indents. Let os.path.join provide the backslash characters.