Updated the plugins so they do the extension checking with a non

case sensitive comparison.

src/osgPlugins/bmp/ReaderWriterBMP.cpp

@@ -305,7 +305,7 @@ class ReaderWriterBMP : public osgDB::ReaderWriter
 {
     public:
         virtual const char* className() { return "BMP Image Reader"; }
-        virtual bool acceptsExtension(const std::string& extension) { return extension=="bmp"; }
+        virtual bool acceptsExtension(const std::string& extension) { return osgDB::equalCaseInsensitive(extension,"bmp"); }
 
         virtual ReadResult readImage(const std::string& fileName, const osgDB::ReaderWriter::Options*)
         {