Koha 16.11 which is set to be released sometime in Nov 2016 will include a new and useful feature  – to be able to quickly add a new patron. This request had been a long pending one. Afterall the request for this enhancement was posted on the Koha bugzilla almost 7 years back.
Those who are testing the Koha unstable release will be able to see it in action already, for the rest of you here are a couple of screenshots to whet your appetite. 🙂
Reference:  Bug 3534 – Patron quick add form