New users should be requested email verification.

Steps to make happen:


-  user['status'] should default to 'needs\_email\_verification'
-  After registering, a property should be set with a unique random
   verification key
-  Link embedding verification key and username should be emailed
   to user
-  Clicking the link should activate the user's account, setting
   user['status'] to active

This is kind of a hand-wavy issue in that it's hard to discern when
it's "completed". I vote we can use a gut feeling to decide one way
or the other.

Thus this bug is for helping to figure out what goes into the
Hacking HOWTO and making sure it gets there.

For April 30th, we want a Hacking HOWTO chapter in the
documentation that covers the following:


1. how to build a working development environment for GNU
   MediaGoblin
2. how to run GNU MediaGoblin in a development environment (the
   deployment howto covers how to run it in a production environment)
3. how to contribute patches
4. where to look for things to work on
5. where to look for help when you're stuck

The document is in the mediagoblin repository in
docs/hackinghowto.rst .

One of the things we're adding to the manual is a chapter on design
decisions. This is important for two reasons:


1. people new to the project can read it, learn what we've decided
   so far, and why
2. people new to the project can glean more about how we plan to do
   what we're doing
3. head off "why didn't you do xyz?" questions which the project
   team has discussed, decided, and moved on
4. gives us a good resource for re-evaluating decisions later on
   down the road when necessary
5. gives people working on other projects a good resource for
   working through these sorts of decisions more quickly for their
   project

For April 30th, we need to do the following:


1. format the question and answer sections in an appropriate way
2. add sections that should be covered that aren't yet
3. add a workflow bit at the bottom for how to add questions in the
   future