(a) on modern platforms, it's way faster to call this
(b) its more accurate
(c) on my SSD, queries are fast enough the System.currentTimeMillis does
not provide a decent measurement

Prohibiting empty predicate for IN clause.

Problem: org.h2.mvstore.db is not exported (OSGi)

Fix issue, update key on MVMAP update about #266

add support for "with"-subqueries into "join" & "sub-query" statements

This causes an ability to deploy applications that use classes like TransactionStore.

Solution: add  org.h2.mvstore.db to MANIFEST.MF

Modifications to build HTML docs

Update from original

Merge remote-tracking branch 'refs/remotes/h2database/master' into fix/spatial_index_update_issue266

ALSO: fixed plan generation for "with"-subqueries