Taking into account modifications on xDeltaTime.
Modified include and added a "using eXlibris_tools::xDeltaTime" to take into account commit 7a5f0493 in Xfiles by A. Salzman.
Modified include and added a "using eXlibris_tools::xDeltaTime" to take into account commit 7a5f0493 in Xfiles by A. Salzman.