Tidy up for C++11, and fixes:

* Remove shared_ptr legacy support
* Add make_unique support for pre-C++14 environments
* Fix comparison bug in sqdb
* Use std::shared_ptr in a few places

Builds/VisualStudio2012/beast.vcxproj

@@ -162,7 +162,6 @@
     <ClInclude Include="..\..\beast\smart_ptr\SharedObject.h" />
     <ClInclude Include="..\..\beast\smart_ptr\SharedPtr.h" />
     <ClInclude Include="..\..\beast\StaticAssert.h" />
-    <ClInclude Include="..\..\beast\STL.h" />
     <ClInclude Include="..\..\beast\Strings.h" />
     <ClInclude Include="..\..\beast\strings\CharacterFunctions.h" />
     <ClInclude Include="..\..\beast\strings\CharPointer_ASCII.h" />

Builds/VisualStudio2012/beast.vcxproj.filters

@@ -1158,9 +1158,6 @@
     <ClInclude Include="..\..\beast\smart_ptr\AbstractObject.h">
       <Filter>beast\smart_ptr</Filter>
     </ClInclude>
-    <ClInclude Include="..\..\beast\STL.h">
-      <Filter>beast</Filter>
-    </ClInclude>
     <ClInclude Include="..\..\beast\Insight.h">
       <Filter>beast</Filter>
     </ClInclude>