Adding DEBUG Suggestion

DEBUG can be used by developers who may want to change options
during testing ala

http://www.projectatomic.io/blog/2015/05/bugfix-container-software-in-place/

It can be used on a shipping container to allow a customer to restart
the container with debugging tools/messages enabled

Author: Brian (bex) Exelbierd

README.md

@@ -22,6 +22,7 @@ The following types of data are being considered:
  | UNINSTALL   | Command to uninstall the image|
  | INSTALL     | Command to install the image|
  | STOP        | Command to execute before stopping container|
+ | DEBUG       | Command to run the image with debugging turned on|
 
 2. Labels Names used to describe the application/image