Add postgres driver to ease testing against psql
llow configuration of database properties
Add the ability to configure the set of schemas to analyze
Add utility to do text based diffs
Replace semantic diffing with siumple text based diff code
Simplify map implementation by using each
Make the context size larger by default and configurable on the command line
Correct the log level tests
Add in basic emitting of tables/columns
Add exported keys
Emit improted foreign keys rather than reverse as that is how we tend to write them
Improve the output slightly so that columns and keys are distinguished
Emit primary keys
Add emitting of table privlidges
Remove unused dialect configuration
Emit column privlidges