Feature/new api functions

"new api functions" branche add the following functions to the API:

• Create New Pipeline https://docs.gitlab.com/ee/api/pipelines.html#create-a-new-pipeline
• List Project pipeline (list pipelines with a specific status) https://docs.gitlab.com/ee/api/pipelines.html#list-project-pipelines
• List Group's projects https://docs.gitlab.com/ee/api/groups.html#list-a-groups-projects

Note that "listing functions" are implemented to retrieve all results (see Send GET Request Multiple.vi)