Adds some creation methods and possibility to use the API with self-signed certificate (sigh...)

The following functions were added to the gitlab API:

• create_project
• set_project_description
• set_project_feature_access_level
• set_project_default_branch
• create_file
• create_branch

The following types were added:

• RepoFile : to represents a file
• ProjectFeature

I am sure it's far from perfect, but use it to automatize project creation in gitlab.

Topic-rename: new-creation-apis