Clean up old write-ups
CSAW CTF 2014: xorcise write-up
CSAW CTF 2014: link to @vanhoefm’s mirror
CSAW CTF 2014: add ‘Fuzyll’ write-up

Closes #139.
CSAW CTF 2014: link to ‘Saturn’ write-up
CSAW CTF 2014: link to some write-ups
CSAW CTF 2014: link to more write-ups
Merge remote-tracking branch 'upstream/master'

* upstream/master:
  CSAW CTF 2014: link to more write-ups
  CSAW CTF 2014: link to some write-ups
  CSAW CTF 2014: link to ‘Saturn’ write-up
  CSAW CTF 2014: add ‘Fuzyll’ write-up
  CSAW CTF 2014: link to @vanhoefm’s mirror
  CSAW CTF 2014: xorcise write-up
  Clean up old write-ups