experimental mq v0.37 available

Hello everyone,

I've made the changes in mq required to support patches in the queue
with more than one parent.  This makes merging easier when you have a
queue of patches changing the same file more than once.  It includes
Samuel's fix from last week.

The changes were not small, so please stick with mq v0.36 or v0.35
unless you want to help debug things.

You can pull it from:

http://www.serpentine.com/~cmason/mq

-chris