Added support for seeds by SecRandomCopyBytes().

This should only work with OS X.
Don't include <Security/SecRandom.h> unless the system is apple.
Updated the tunnel README to include additional details surrounding any issues I had + refactored things a bit to fit the changes
Added a check that prevents possible garbage value.
Add a minimum timeout so GMRT is not driven to 0.
merging
Don't zero local nodes for a search timeout.
Better logging when a node's reach is zeroed.
Don't allow zeroing of reach when a node responds to a ping or search in exactly the right time and don't allow ugly integer underflow.
Add comma in default cjdroute.conf so that it is valid JSON again
Merge branch 'master' of git://github.com/prurigro/cjdns
Merge branch 'minor-fixes' of git://github.com/mbsmith/cjdns
Merge branch 'master' of git://github.com/duncanpk/cjdns
Update README to be a bit more approachable.
Minimal changes to the readme, rewrote the anonymity section which was extensive, confusing and slightly incorrect.
Fixed libuv on FreeBSD
Fixed spelling mistakes/grammar
Merge branch 'patch-2' of git://github.com/dansup/cjdns
Reset the session if the sender handle is zero which means it's unknown