Removed dispatch from RASqlite-class.

The dispach calls have been removed from the RASqlite-class, these
will be implemented within the upcoming RASqliteQueue-class.

This change will ease, and handle more correctly, executing multiple
queries that are dependant on each other, aswell as transactions.
Implemented execute query queue and rewritten the Terminal example.
Merged RASqliteQueue and RASqlite, and updated sample.
Implemented support for executing queries outside of `queueWithBlock:` and `queueTransactionWithBlock:`.