Adding tm1project to the Git service

[nicolasbisurgi]

In these commits you will find the GitProject.py that has the class, properties and methods to handle the tm1project and the GitService that incorporates the GitProject objects and adds the ability to get, put and delete the tm1project from/to the server. This is a first draft so we can make changes along the way. I also have some of the tm1project sections defined as classes (like object, task and deployment) but I'm not done with them.