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

beast/smart_ptr/SharedObject.h

@@ -63,7 +63,7 @@ namespace beast {
 
     @see SharedPtr, SharedObjectArray, SingleThreadedSharedObject
 */
-class BEAST_API SharedObject : public Uncopyable
+class SharedObject : public Uncopyable
 {
 public:
     //==============================================================================