Upgrade to latest Calcite release (renamed from Optiq).
Add examples of scannable and filterable tables, matching [CALCITE-436] Simpler SPI to query Table.

(Depends on optiq-436 branch of julianhyde/optiq.)

Move some data files around.

Update from optiq-0.9.0 to calcite-0.9.1; change jdbc:optiq: to jdbc:calcite: in tests.