REALSQLDatabase improvements

SQLite can do a few more things than REALSQLDatabase implements, so we have a few wishes there in Feedback:

Please add API to set page_size on REALSQLDatabase
Please add API to call sqlite3_busy_timeout on REALSQLDatabase

While I can do a lot with plugins, hacking in a function like the timeout one is not easy and breaks once Real Software changes the plugin. Please sign on or comment if you are also interested in getting this cases done.