[development] Seems I need to take sandbox in my own hands

[Chad Phillips -- Apartment Lines]

i'm just going to toss this out there as a general proposal:

1. move the sandbox completely out of the contrib repo, and make a  
new one -- this has the dual benefit of moving our 'messy' space away  
from our 'clean' space, and making the checkouts of the contrib repo  
faster/cleaner.  you can then checkout the mess if you choose to.  :)

2. in the new 'sandbox' repo, put a limit on how much each user can  
have in their active folder -- maybe 1 or 2 MB, which should be  
plenty for an experimental code home.  i think this would be a pretty  
easy thing to implement.  this would allay any bandwidth/space  
concerns about our chaotic space.

i love the idea of having a more clear policy of what goes where, and  
setting up systems that encourage collaboration.  i feel that a  
community place for chaos belongs in that map somewhere...