- Remove wrapper functions for CreateCommand and BeginTransaction.
- Access the database connection through a read only property so
only the Database class can change it.
- Store the SQL commands for initialising the database(s) in resource
files so they are easier to maintain. This removes the dependency
for an internet connection when opening the program as it no longer
needs to download the SQL from http://pcjco.dommel.be
Signed-off-by: Andrew Fyfe <email@example.com>