Fix #26 fc::variant deserialization of boost::multiprecision::number<T>

Looks good to me. Doesn't break the build on my Linux box.

Define notify handlers and require notifications be set correctly for
messages moving funds from liquid to staked and back, so balances are
tracked as they move between contracts

Create all three native contracts at genesis, and split the various
messages among them appropriately.

Update the ignore file to include more build artifacts and to exclude some legitimate *.cmake fles. Add to lib/fc/ cmake to add explicit reference to secp256k1 location for an issue on mac.

Initial work on locking EOS, beginning unlock, and claiming unlocked
EOS.

TODO: Actually split the system contract, and define names for the
different parts so we can check that the required notifications are made.
Also, figure out how to write notify handlers for the native contracts,
to handle these critical balance updates in the staking/unstaking of
EOS. See the #warning TODO comments in the commit for context.

Begin defining objects and contract handlers for tracking producer votes
and the "race" to select runner-up producers

Replace monolithic implementation file system_contract_impl.hpp with
topic-specific implementations in separate files with clean header/
implementation separation. Use structs to namespace the various message
handlers rather than Message_ prefixes.

Eventually I'd like proper Docker infrastructure, but this is a good
enough starting point just to demonstrate a proper development environment

Make the language a bit more consistent

Remove discussion of outdated dependencies and update instructions to describe a single-node testnet.

Since the P2P code was the reason we had the outdated dependencies that made setting up a development environment such a pain, we removed it until we can implement a better solution. In the meantime, only single-node testnets are possible.

Taking cues from https://github.com/LocutusOfBorg/websocketpp/commit/
1dd07113f2a7489444a8990a95be42e035f8e9df

We shouldn't need this anymore. I don't even think we use this anymore.

These changes should add support for openssl 1.1.0 while maintaining
compatibility with 1.0.2

Missing #include<mutex> necessary to use std::unique_lock. According to
http://en.cppreference.com/w/cpp/thread/unique_lock the correct header
is <mutex>.

- remove BTS P2P code which depended on fc threads which depended on
deprecated boost::context API

- remove fc submodule and making fc part of eos repository

Add README with build and run instructions

This completes the refactor (to a buildable/tests passing state) from my
last commit.