seed using the query builder

Signed-off-by: Suhayb El Wardany <me@suw.me>
remove unused files

Signed-off-by: Suhayb El Wardany <me@suw.me>
update readme
update manual url

Signed-off-by: Suhayb El Wardany <me@suw.me>
Merge branch 'master' of github.com:cartalyst/demo-data-grid