feat(docs): add an implementation guide for more in-depth details on how to use 4JLibs expansions

feat(storage): save titles are now encoded into the name of the save files
feat(storage): added functionality to delete save files
chore(storage): document functions which don't have to be implemented, as they're unused for the Windows platform
chore(storage): rename some variables to be more accurate with the binaries
fix(render): in vs2012, m_backBufferTexture cannot be initialized in a header
fix(storage): in CDLC::GetMountedPath, m_szMountPath and m_szDirectoryPath were mixed up
fix(storage): in CSaveGame::SetSaveTitle, there was a wide string to narrow string mismatch

Windows_Libs/Dev/Storage/STO_DLC.h

@@ -35,8 +35,8 @@ public:
             ;
         }
 
-        std::string m_szDirectoryPath;
         std::string m_szMountPath;
+        std::string m_szDirectoryPath;
     };
 
     XCONTENT_DATA &GetDLC(DWORD dw);
@@ -72,7 +72,7 @@ public:
     LPVOID m_pMountedDLCParam;
     std::string m_szMountPath;
     DWORD m_uiCurrentMappedDLC;
-    DWORD dword94;
+    DWORD m_dwLicenseMask;
     char m_szPackageRoot[40];
     DWORD dwordC0;
     std::vector<DriveMapping> m_vDLCDriveMappings;