Build everything by default. Fix broken include path. Fix building on

orge 1.8.0, ParseSizeT is only in 1.8.1. Replaced with ParseUnsignedInt.
this should not be necessary as the path is added to the include paths [1] could you check why it is not found despite [1] ?
[1] https://github.com/zerotacg/q-gears/blob/master/QGearsMain/CMakeLists.txt#L261