Add a command 'create' to create a new project

=>create the folder project and clone this folder into the directory
the name of the branch is now an option
optionSet & co
Don't systematically create the team project folder when it doesn't exist

(add an option for that!)
create.md doc file
Better exception handeling when unable to create the project folder
Merge pull request #380 from pmiossec/create

Add a command 'create' to create a new project