+ fixes #0001361: StartPage scripts and resources are installed twice
+ revert regression with mixing Python debug and release libs
+ fixes #0001363: VRML export can produce corrupt files
+ allow to modify placement via sub-attributes
+ make sure to use valid compression level
+ degree symbol is not 7-bit ASCII, use utf-8
Draft: Fixed polygon center snap
Detect OCC/OCE version by parsing Standard_Version.hxx

The OCC/OCE version is determined by using the cmake REGEX command.
The result is saved as OCC_VERSION_STRING. The comparsion VERSION_LESS
requires cmake version >= 2.8.0