Providing generic http interface to wallet.
added http response code to fc
Factor out a lot of the information encoded into JSON-RPC functions into
a table storing metadata.  This simplifies implementation of the RPC
functions, and allows the CLI to do a better job of parsing arguments
and formatting results.

Conflicts:
	libraries/rpc/include/bts/rpc/rpc_server.hpp
	libraries/rpc/rpc_server.cpp
Compile fixes after merging in http rpc commits
Resurrect the derived CLI for DNS and have it pretty-print the
output of list_active_auctions.
Merge pull request #11 from BitShares/master

Merge from BitShares/master