[development] Module Dependency checker for 4.7

[Chad Phillips -- Apartment Lines]

yesterday i came across a way for modules to do simple dependency  
checking using a neat form api trick, so today i coded it up and  
posted here:

http://drupal.org/node/54463

it's all in the notes.  basically, if you have a module that is  
dependent on any other module, you can drop in the code on that page,  
set your dependenices, and be good to go.

lemme know if i missed anything.  i tested a fair amount today, and  
as far as i can tell it works perfectly.

chad