New class RPC::Status enforces JSON-RPC 2.0 error format.

* Relevant issues:
  * RIPD-92
  * RIPD-97
  * RIPD-98
  * RIPD-439
Fix outgoing bytes calculation in HTTP server.
Call Stoppable::stopped in PeerFinder onStop.
Disable transaction submission tests under Travis.
Refactor SerializedTransaction:
* Use boost:tribool instead of two intertwined bool variables
* Trim down public interface, reduce member variables
Disable SSLv3
Remove boost_thread dependency (RIPD-216).

Fixes RIPD-216
Fix tabs and trailing whitespace.
Detab beast
[checkpoint] Testing out the functionality of the ws.
[checkpoint] Use new wallet class in ripple-lib
* Pending pull https://github.com/ripple/ripple-lib/pull/161
[checkpoint] Submit and process a transaction
[checkpoint] Simulate random transactions over time
[checkpoint] Ledger summary stats.
[checkpoint] Don't output the full ledger.
[checkpoint] Need a newer version of ripple-lib
* Force exit on server disconnect.
[checkpoint] Organize a function library. Attack scenario.
[checkpoint] Create a bunch of trustlines for 1 account.
[checkpoint] Up the ledger_accept timeout
[checkpoint] more timing tweaks