Added ability for candatagrid to show the currently used bits in gray.

Used in signal editor to help make it easier to know what bits are
used. Added single and double precision float code where appropriate.
They weren't supported at all before. But, that code isn't really
tested yet. Added support for multiplexed signals. Most all the code
for the UI is done and some of the backend but it isn't hooked into
the actual signal processing code just yet. Updated program version
number.

mainwindow.cpp

@@ -15,6 +15,8 @@ Single / Multi state - The goal is to find bits that change based on toggles or
 
 fuzzy scope - Try to find potential places where a given value might be stored - offer guesses and the program tries to find candidates for you
 or, try to find things that appear to be multi-byte integers
+
+Change dbc editor to be able to do multiplexed signals
 */
 
 QString MainWindow::loadedFileName = "";
@@ -820,7 +822,7 @@ void MainWindow::handleSaveDecoded()
 void MainWindow::saveDecodedTextFile(QString filename)
 {
     QFile *outFile = new QFile(filename);
-    const QVector<CANFrame> *frames = model->getListReference();
+    const QVector<CANFrame> *frames = model->getFilteredListReference();
 
     if (!outFile->open(QIODevice::WriteOnly | QIODevice::Text))
         return;