release 0.13.0

Release 0.13.0:

1 Add groupId as optional attribute for the following requests:

• CreateTutorialProject
  - CreateProject
  - ListProjects

2 - Replace InlineObject with uploadFileReq in upload file request.
Inside upload file response (AvailableFile model):
- Remove file_id as it was deprecated for a while. (The id is returned inside 'id' field)

3 Inside get project and list project response (AvailableProject/ProjectDetail models)

• Remove project_id as it was deprecated for a while. (The id is returned inside 'id' field)
• Add groupId as an optional attribute

4 Update delete files requests by providing the list of files to delete in JSON instead of headers.