pull app.name from laravel-bootstrap package

Update to actual pull app.name from app/config/packages/davzie/laravel-bootstrap/app.php
Update and rename UserTable.php to ExampleUserSeeder.php

Updating/Renaming for consistency with ExampleSettingsSeeder.
Update to Point to the renamed ExampleUserSeeder
Merge pull request #24 from ericnkatz/master

Update to Example Seeds to include app.name