Merging Concept and Instance editor

Lots of changes for today!

Now the Ontology is a global object accessible to all sections of the tool, including Concepts and Instances.

Now the frames can be added to specific namespaces, for example "onto." for concepts, "env." for instances or "*." for special elements (relations).

Frame Editor

Now, for the frames tree, is possible to filter frames by namespace, specify the root frame and the relation used to build the tree.

When selecting a Concept a new Instance will automatically be generated and added to the database.