Fixed a bug where DB connections were stale.

The DB connections were potentially stale in high frequency write-read cycles. This has been fixed with a directive to the DataSource that forces it to finish commits before accepting a Connection back into the data pool.

Also, some grammatical errors were fixed and some commented out code removed.
Reworked a query for observer/stream data read.

Based on some basic testing, a rewrite of one of the queries that backs observer/stream data reading has made the stream/read API call much faster.

Closes #588