Updating system files to CI 2.1.3.

The first step to doing a CI upgrade.
Migrating ip addresses to new form.

CI 2.1.3 requires it, and it futureproofs the schema for IPs.
Updating the migration config.

This will make sure the IP change is run.
Updating security core extension to 2.1.3.

Method for CSRF_Verify has changed
Moving application folder to new ci_2.1.3 location.
Merge branch 'ci-2.1.3' into modern-css

Conflicts:
	ci_2.1.3_application/controllers/patch.php
	ci_2.1.3_application/views/user_report.php