added needed for modules
Merge pull request #444 from georgebyelas/master

Added needed for new grid modules export
renamed OWLFunction ---> OWLModel, removed all unnecessary methods
removed unuseful classes
increased the number of mappings in the result
small fix
allow numbers in the description of data items
remove unused code
cleaned up harmonization plugin by removing all unnecessary handleRequest method at the moment
added a new luceneIndexPlugin to index data items in database
merged