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

modules/beast_core/diagnostic/FatalError.cpp

@@ -91,7 +91,7 @@ FatalError::FatalError (char const* message, char const* fileName, int lineNumbe
 
     static LockType s_mutex;
 
-    LockType::ScopedLockType lock (s_mutex);
+    std::lock_guard <LockType> lock (s_mutex);
 
     String const backtraceString = SystemStats::getStackBacktrace ();