Peter Huene e5280b2c57 Add --force-colour option to force colour output.
Adding a --force-colour option to force colour output on POSIX systems,
provided a debugger is not attached.

This allows for Catch to output colours even if STDOUT is not a tty,
which can be the case when the test executable is being spawned by a
parent process (e.g. CMake's ctest).
2015-02-11 13:12:42 -08:00
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