Added VS2013 project for dictBuilder

- fixed strings.h vs string.h include
- fixed INLINE/FORCE_INLINE defines

visual/2013/zstdlib/zstdlib.vcxproj

@@ -27,6 +27,8 @@
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\..\..\lib\bitstream.h" />
+    <ClInclude Include="..\..\..\lib\error_private.h" />
+    <ClInclude Include="..\..\..\lib\error_public.h" />
     <ClInclude Include="..\..\..\lib\fse.h" />
     <ClInclude Include="..\..\..\lib\fse_static.h" />
     <ClInclude Include="..\..\..\lib\huff0.h" />

visual/2013/zstdlib/zstdlib.vcxproj.filters

@@ -68,6 +68,12 @@
     <ClInclude Include="..\..\..\lib\mem.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\lib\error_private.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="..\..\..\lib\error_public.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ResourceCompile Include="zstdlib.rc">