Make Doxygen spit less warnings.

Oh where are the times when Doxygen didn't spit ANY warning.

src/ImageFormat.h

@@ -35,13 +35,13 @@ namespace Magnum {
 
 /**
 @copybrief ColorFormat
-@deprecated Use @ref ColorFormat instead.
+@deprecated Use @ref Magnum::ColorFormat "ColorFormat" instead.
 */
 typedef ColorFormat ImageFormat;
 
 /**
 @copybrief ColorType
-@deprecated Use @ref ColorType instead.
+@deprecated Use @ref Magnum::ColorType "ColorType" instead.
 */
 typedef ColorType ImageType;
 

src/Text/TextRenderer.cpp

@@ -359,7 +359,9 @@ void AbstractTextRenderer::render(const std::string& text) {
     delete layouter;
 }
 
+#ifndef DOXYGEN_GENERATING_OUTPUT
 template class MAGNUM_TEXT_EXPORT TextRenderer<2>;
 template class MAGNUM_TEXT_EXPORT TextRenderer<3>;
+#endif
 
 }}