win32-clang-msvc has an error when compiling with /WX. The moc_predefs.h
file is not being built correctly, while without /WX it works. The
change should be reverted to enabling /WX for all msvc compilers when
the clang-msvc issue is fixed.
Update path to clang-format in appveyor file
Retry CI on Python script
Python script failed on CI due to run-clang-format.py: error: [Error 5]
Access is denied. Research says attempting again might solve the
problem.
The appveyor script can not use a single quoted double quotes string,
like '"C:\Spaces are trouble\"', hence the solution of defining an
environment variable.
appveyor.yml has been renamed to .appveyor.yml to keep consistent with
.travis.yml and to be default hidden.
Vasily