[MR] Metalsmith class signup

[Gustav von Silberwald]

We have the class signup online. You need to pre-register to sign up for 
classes. We'll keep class registeration open until the week of the event but 
don't wait, the class you want may fill up quick!

http://www.stierbach.org/events/metalsmith/signup.html
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"Just remember the physical challenges are a little rigorous but the rewards are 
inconsequential" - Phineas