Modified the ws interface to be multi-threaded. The number of threads is currently hard-coded at four. Next step is to take the thread count as a start-up parameter.
orlyi: Make JumpRunnable catch and rethrow exceptions

Previously it just let them fly by and straight into the fiber
schedule which would result in badness.
util/error.test: Disable the interrupt test because it sometimes gets stuck forever.
Merge pull request #125 from cmaloney/error-test-retry

util/error.test: Disable the interrupt test because it sometimes gets stuck forever
Merge pull request #124 from cmaloney/jump-runable-rethrow

orlyi: Make JumpRunnable catch and rethrow exceptions
Added --num_ws_threads as orly command-line arg.
Merge pull request #126 from JasonL9000/master

multi-threaded ws interface
base/fd: Move a utility function (Read a file into a string) into fd.h
base: Add function to convert items which have ostream printers to strings.
orlyi websockets: Add a get_source command to grab the source code of a compiled package.
websockets: Always return valid json

This changes the websockets layer to always build a TJson object
rather than the mix of hand formatting we had before. Forces
correctness in terms of emitted JSON.