Clean up where documentation shows up during the build

task #26: Find new database schema diagram tool 
http://github.com/jpschewe/fll-sw/issues/issue/26
Remove old database model

Now that we're generating the database diagram, this can be removed.

Fixes #26

task #26: Find new database schema diagram tool 
http://github.com/jpschewe/fll-sw/issues/issue/26