Refactor supportedFileExts from AudioFileProcessor

Refactor supported file extensions from AudioFileProcessor to
sampleBuffer, where the magic really happens. Change the hard-
coded MessageBox explaining supported formats to the real deal.
Also added modelines and switched spaces to tabs in the files
affected.

include/plugin.h

@@ -215,3 +215,5 @@ private:
 
 
 #endif
+
+/* vim: set tw=0 noexpandtab: */

include/sample_buffer.h

@@ -46,6 +46,11 @@ class EXPORT sampleBuffer : public QObject, public sharedObject
 {
 	Q_OBJECT
 public:
+	static const char * supportedExts[];
+	
+	QString niceListOfExts() const;
+	
+
 	class EXPORT handleState
 	{
 	public:
@@ -254,4 +259,4 @@ signals:
 
 #endif
 
-/* vim: set tw=0 expandtab: */
+/* vim: set tw=0 noexpandtab: */