Fix warning in common/hyperspace.cc
Allow "tolerate 0 failures"
Change "hyperdex-initialize-cluster"

It used to take just one path to the library.  Now it guesses a whole host of
paths, and gives the option to specify many paths on the commandline.  No more
OS X, Linux gotchas.
Handle signals properly within busybee
Improve the performance of string equality search
make distcheck