Challenge description for sample database

This challenge description can be used to create our database diagram.

task #26: Find new database schema diagram tool 
http://github.com/jpschewe/fll-sw/issues/issue/26
Make example goals and categories obvious

Use 'aaa_example' as a prefix so that it's clear these are dynamic per
challenge description.

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

This uses the example challenge description to create a database and
then calls SchemaSpy with a custom config for an HSQL in memory
database.


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

target is doc.database-diagram


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

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

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