Improve/Fix seed script

Seed script fails partway through (this was brought up in #419).

Also, it would be nice if we could add another script or a flag option or what have you for 'quick mode', which woudl auto generate app configs and other metadata and generate some fixed number of database items
For this line and all other lines, we should write which records were just created. i.e.,
```
puts "\n#{entered_num} user records successfully created!"
```
Without this and running the script with ```rake db:seed minimal=true```, we get three successes in a row without knowing what was successful.