Write up our results on DoS attacks and defense strategies

We've got notes at https://trac.torproject.org/projects/tor/wiki/org/meetings/2015SummerDevMeeting/AddressingDenialOfServiceAttacks , and throughout our various text files. It's time to turn them into a proper writeup for analysis and comment.

Due end-of-month.

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information