Fixed the provider for the name of the OSAPI when listing it in the
library editor.
Mayor bugfix
Now the library manager implementation allows to upload and manage two
different models with the same URI but of a different class.
In order to implement this functionality, the original implementation of
the library manager has had to be modified, as well as the
implementation of the library hooks. All the plug-ins that use the hooks
have also had to be modified in order to support the new implementation.
Language plug-ins update
The language plug-ins have had to be modified in order to adapt them to
the new library hook interface.
Updated plug-ins
The plug-ins have been updated to support the new library hook
interface. This change affects mainly to the use of the library hook to
install the construction tool models.
Minor modification of the language tester.