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