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Merging matchers test

More on MSVC warning C4503, decorated name length exceeded

Fixing build break on MSVC

merging gmock matchers 1

and x64_windows_msvc

This makes it easier to use GTest in projects that build with the
-Wmissing-declarations warning. This fixes the warning in headers and
source files, though not GTest's own tests as it is rather noisy there.

Without the directive embedding googletest into third_party breaks
any //... target.

change static_cast to ImplicitCast_ for consitency
fixes for building with path names containing spaces

Slightly better names and cleaner tests.
Please review