Put spec file into MASTER

See merge request !8

format: refactor spec to add doc

See merge request !6

Feature/put endpoints

See merge request !7

Trackables and anchors now have a name param (naming the elements are crucial...

See merge request !5

- deleted AttachedObjects (action + schema)
- new version number
- some new descriptions
- new default matrix
- new default UUID (all are now differents)

Trackables and anchors now have a name param (naming the elements are crucial to understand the graph and useful for the GUI).
New ObjectType (NotIdentified) for to/from of a WorldLink when element is deleted from the graph.
New encoding types: vuforia, aruco.

Major and minor changes.

See merge request !4

Some corrections in the main MD file.
Commenting "application/xml" block while this create some warnings in the generator.

New headlines in yaml file.
Reformating whoel yaml.
Introduction of components/repsonses params.
Some extensions in two MD files.
New GET method for the end objects of a world link.

Dimension becomes size
Create an orientation for the world link (UUIDFrom, UUIDTo)
CRS becomesTransform3D
Deleted every duplicated descriptions (they are factorized at the schemas level when possible to avoid discrepancies)

Rename from branchingPolicy.png to BranchingPolicy.png to fit with the reference in the Readme.md file