Create a default facility at install time

This eliminates the need to create a facility, and allows students to  create their own accounts sooner.  

With the new admin tools, it is much easier to:
* Edit the default facility name
* Move users across groups
* Edit student accounts

Because editing and moving are so much easier and in front of the admin (facility editing is the top visible item in the default page after login for admins), seems reasonable to create a default and require optional editing in order to facilitate things.  We see many places using a single facility anyway.

Major downside is that we do collect quite a bit of deployment information from the Facility form, that we are likely to lose through this method.

For now, I suggest we try this out.  It can be easily disabled if we want, but hopefully #1808 will help motivate people to fill out a facility profile (as will the exposure of the online tools).

![image](https://cloud.githubusercontent.com/assets/4072455/2564724/ffb18b74-b8a6-11e3-8a69-775772a291c8.png)