Added Expressions - to be refined and code should be generated for them.
We also need to use them in the model.
Finalized the expressions and the rest of the meta-model. It is ready to
generate code from.
migrated from JET to Acceleo. The generator has been tested and
everything is being generated as it should. The generated code, however,
is not deployed as Joomla! component. There might be typos and other
errors introduced during migration.