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/text/LexicalCast.cpp

@@ -107,7 +107,7 @@ public:
 
     void run()
     {
-        int64 const seedValue = 50;
+        std::int64_t const seedValue = 50;
 
         Random r (seedValue);
 
@@ -115,10 +115,10 @@ public:
         testIntegers <unsigned int> (r);
         testIntegers <short> (r);
         testIntegers <unsigned short> (r);
-        testIntegers <int32> (r);
-        testIntegers <uint32> (r);
-        testIntegers <int64> (r);
-        testIntegers <uint64> (r);
+        testIntegers <std::int32_t> (r);
+        testIntegers <std::uint32_t> (r);
+        testIntegers <std::int64_t> (r);
+        testIntegers <std::uint64_t> (r);
     }
 };