Allow the cloud instance to create project and submit PR

[pascalgrimaud]

It's a global ticket here, which must be splitted into smaller ones

The idea is:

• The user must be logged into GitHub
• he/she can:
  • create a new one
  • select an existing projects or in his organization
  • JHLite will clone the project and display the existing modules already applied
• when apply new, JHLite will
  • create a new branch
  • apply the module(s)
  • submit a pull request

It's similar to what JHipster Online provides, we should keep the idea, but not the code