Please, check these out, first:
http://product.hubspot.com/blog/git-and-github-tutorial-for-beginners
http://dont-be-afraid-to-commit.readthedocs.io/en/latest/git/commandlinegit.html
You can run the scripts: TextureMap.py and TextureMapInterface.py, as long as you have the dependencies installled:
sudo (yum or dnf) install PyQt4-devel python2-pyopengl
or
sudo (yum or dnf) install python3-PyQt4-devel python3-pyopengl
sudo apt-get install python-qt4-dev python-opengl
or
sudo apt-get install python3-pyqt4 python3-opengl
sudo port install py27-opengl py27-pyqt4
or
sudo port install py34-opengl py34-pyqt4