Workout Library Part 1 of 3

Implementing a workout library that keeps
track of media and workouts that can be used
in train view.

This first part implements;
- library.xml to record search paths
- search dialog to find media/workouts

Part 2 and 3 will bring:
- Sqllite libraryDB to store found details
- Update traintool to use libraryDB and display
  icons, duration/distance, IF and TSS in list
- import and drag-n-drop of new media/workouts

src/ErgFile.cpp

@@ -21,6 +21,25 @@
 #include <stdint.h>
 #include "Units.h"
 
+// Supported file types
+static QStringList supported;
+static bool setSupported()
+{
+    ::supported << ".erg";
+    ::supported << ".mrc";
+    ::supported << ".crs";
+    ::supported << ".pgmf";
+    return true;
+}
+static bool isinit = setSupported();
+bool ErgFile::isWorkout(QString name)
+{
+    foreach(QString extension, supported) {
+        if (name.endsWith(extension, Qt::CaseInsensitive))
+            return true;
+    }
+    return false;
+}
 ErgFile::ErgFile(QString filename, int &mode, double Cp, MainWindow *main) : 
     Cp(Cp), filename(filename), main(main), mode(mode)
 {