[documentation] Getting Involved book is born

[Addison Berry]

I have gotten the bulk of moving and stub page creation done for the  
Getting Involved book. There is a list of issues with work still to do  
on the main landing page now: http://drupal.org/getting-involved. The  
most important tasks are getting incomplete pages filled out and  
continuing to reorganize the Contribute code section. i am going to  
keep chipping away at that over the weekend so if you would like to  
help with that, please coordinate with me.

Thanks for everyone's help on this. We are almost there. :-) I will be  
in and out over the weekend but feel free to ping me if you have  
questions and use the #drupal-docs IRC channel to work on things  
together.

Thanks
- Addi (add1sun)