Upgrade to LMDB Version 1.0

This major version update includes an update to LMDB 1.0, which has incompatible database format with LMDB 0.9.x. This release includes an automated upgrade when opening a LMDB 0.9.x database and attempts to upgrade the database to LMDB 1.0 (by copying all the records from the older format to newer format). This involves the use of the lmdb-store-0.9 package to handle reading from the old format. In the future, this package will not be included, and upgrade will require explicitly including that package.