jPivot is working, documentation is all that's left to do (almost, maybe).

- Doc updated (Data Warehouse), DW schema created.
- DW schema filled with lots of fake entities (courtesy of Sir Internet, The).
- Mondrian schema created.
- JPivot page created, date problems solved by changing the DW schema with all `integer`s reset to `character varying`. JPivot example working, to be integrated in the Web app (as a link?).