Add support for table partitions

[dmcghan]

QS doesn't currently support table partitions. It would be great if support were added so we could make better use of QS.

[vadim-tropashko]

The goal of QSQL is to simplify database schema design, and to abstract away as many low level implementation storage artifacts as possible. From that perspective, table partitions are redundant. Or, to put it bluntly: partitions are poor man indexes.