New functions for projectFile (getProjectDescription, setProjectFile, createNewProject, getAllProjects) and level (tgAssignedProjects).

Level-descriptions:

Level: 0
No changes, all projects are returned where the user is a member.

Level: 1
Only returns projects where the user has the roles Beobachter or Bearbeiter or any public resources are available.

Level: 2
Only returns projects where the user has the roles Beobachter or Bearbeiter.

Level: 3
Only returns projects where the user has the role Bearbeiter.

Level: 4
Only returns projects where the user has the role Projektleiter.



git-svn-id: https://textgridlab.org/svn/textgrid/trunk/middleware/tgauth@2781 7c539038-3410-0410-b1ec-0f2a7bf1c452