Yann Voté authored Nov 18, 2016 and Sebastien Petitdemange committed Nov 17, 2017

This is a combination of 2 commits.
Also use context manager to read file
[cmake] Use conf file to say what to compile

Instead of hardcoding `-D COMPILE_XXX=1` arguments to cmake, which adds
duplication with `config.inc` file.

Thus `config.inc` becomes the only trusted configuration source.

We then disable SPS_IMAGE by default on Windows since it does not
compile on this platform and enable BASLER.

Note that we keep hardcoded `-D COMPILE_SIP=1` because we always want to
compile Python modules.