Some things aren't completely clear, such as how the provisioners classes should be used.
For instance, it wasn't explicit just from a provisioner itself that each PM hast to use its own instance of the provisioners such as ram and bw provisioner, and that it physical PE has to have its own instance of a PE provisioner.
The documentation was improved to make clear these assumptions.

Some @todo were added in order to make some improvements in the code clarity further.
For instance, some attribute names are confusing, such as "ram". It is not clear if it represents the capacity, allocated ram or anything else. However, the documentation of the attributes was accordingly updated to avoid these confusions.