Add preliminaries for signal viewer, update version number, switch dbc handler to singleton pattern, changes to DBC attributes

canframemodel.cpp

@@ -58,7 +58,7 @@ CANFrameModel::CANFrameModel(QObject *parent)
     frames.reserve(preallocSize);
     filteredFrames.reserve(preallocSize); //the goal is to prevent a reallocation from ever happening
 
-    dbcHandler = NULL;
+    dbcHandler = DBCHandler::getReference();
     interpretFrames = false;
     overwriteDups = false;
     useHexMode = true;
@@ -89,11 +89,6 @@ void CANFrameModel::setSecondsMode(bool mode)
     }
 }
 
-void CANFrameModel::setDBCHandler(DBCHandler *handler)
-{
-    dbcHandler = handler;
-}
-
 void CANFrameModel::setInterpetMode(bool mode)
 {
     //if the state of interpretFrames changes then we need to reset the model