Find python interpreter

This module finds if Python interpreter is installed and determines where the executables are. This code sets the following variables:

PYTHONINTERP_FOUND         - Was the Python executable found
PYTHON_EXECUTABLE          - path to the Python interpreter
PYTHON_VERSION_STRING      - Python version found e.g. 2.5.2
PYTHON_VERSION_MAJOR       - Python major version found e.g. 2
PYTHON_VERSION_MINOR       - Python minor version found e.g. 5
PYTHON_VERSION_PATCH       - Python patch version found e.g. 2

The Python_ADDITIONAL_VERSIONS variable can be used to specify a list of version numbers that should be taken into account when searching for Python. You need to set this variable before calling find_package(PythonInterp).