beast cleanup and tidying:

* Replace custom types with C++11 <cstdint> types
* Fix sqlite integer intos and uses
* Fix String implicit integer constructors
* Escape the enclosing namespace in sqdb
* Replace contract checks with assert
* Make many header files compile independently
* Remove the dependence on beast_core.h in many places
* Remove unused or obsolete classes and functions
* Remove unused or obsolete macros
* Remove unused network functions and files
* Remove unused or obsolete classes:
  - ChildProcess
  - HighResolutionTimer
  - InterProcessLock
  - Throw
  - TrackedMutex
  - UntrackedMutex
  - XmlDocument
  - XmlElement

src/ripple_overlay/impl/Peers.cpp

@@ -21,8 +21,11 @@
 #include "PeerImp.h"
 
 #include "../../ripple/common/seconds_clock.h"
+#include "../../beast/beast/ByteOrder.h"
 
 #include <boost/config.hpp>
+
+#include <cassert>
 #include <condition_variable>
 #include <mutex>
 
@@ -535,14 +538,14 @@ public:
                 boost::unordered::piecewise_construct,
                 boost::make_tuple (peer->getShortId()),
                 boost::make_tuple (peer)));
-        check_postcondition(idResult.second);
+        assert(idResult.second);
 
         std::pair<PeerByPublicKey::iterator, bool> keyResult(
             m_publicKeyMap.emplace (
                 boost::unordered::piecewise_construct,
                 boost::make_tuple (peer->getNodePublic()),
                 boost::make_tuple (peer)));
-        check_postcondition(keyResult.second);
+        assert(keyResult.second);
 
         m_journal.debug << 
             "activated " << peer->getRemoteAddress() <<
@@ -550,7 +553,7 @@ public:
             ":" << RipplePublicKey(peer->getNodePublic()) << ")";
 
         // We just accepted this peer so we have non-zero active peers
-        check_postcondition(size() != 0);
+        assert(size() != 0);
     }
 
     /** A peer is being disconnected