Features/148 vaurien

This adds basic vaurien testing for blackout and delay testing for ichnaea.

In general ichnaea fails in the expected ways - submit returns 500 when redis is down and searches return 500 when mysql is down.  When the proxies are set back to dummy, ichnaea recovers gracefully. 

I had one instance where ichnaea used up all file handles, but I had no luck reproducing that error.

All results are in README.TXT.