Issue 274: Sybase/MSSQLServer compatibility - support index clause e.g. "select * from test (index table1_index)"

Fix Issue 389: When there is a multi-column primary key, H2 does not seem to always pick the right index

Add new collation command SET BINARY_COLLATION UNSIGNED, helps with people testing BINARY columns in MySQL mode.

MVStore - improvement to free space management - saves us from having to generate a large BitSet every time we need to allocate a chunk

When using local temporary tables and not dropping them manually before closing the session, and then killing the process could result in a database that couldn't be opened (except when using the recover tool).