Rename Jp2ImageImporter alias to Jpeg2000ImageImporter for better clarity.

src/MagnumPlugins/AnyImageImporter/AnyImageImporter.cpp

@@ -65,7 +65,7 @@ void AnyImageImporter::doOpenFile(const std::string& filename) {
             Utility::String::endsWith(filename, ".jpe") )
         plugin = "JpegImporter";
     else if(Utility::String::endsWith(filename, ".jp2"))
-        plugin = "Jp2Importer";
+        plugin = "Jpeg2000Importer";
     else if(Utility::String::endsWith(filename, ".mng"))
         plugin = "MngImporter";
     else if(Utility::String::endsWith(filename, ".pbm"))

src/MagnumPlugins/AnyImageImporter/AnyImageImporter.h

@@ -71,7 +71,8 @@ Supported formats:
 -   Radiance HDR (`*.hdr`), loaded with any plugin that provides `HdrImporter`
 -   JPEG (`*.jpg`, `*.jpe`, `*.jpeg`), loaded with @ref JpegImporter or any
     other plugin that provides it
--   JPEG 2000 (`*.jp2`), loaded with any plugin that provides `Jp2Importer`
+-   JPEG 2000 (`*.jp2`), loaded with any plugin that provides
+    `Jpeg2000Importer`
 -   Multiple-image Network Graphics (`*.mng`), loaded with any plugin that
     provides `MngImporter`
 -   Portable Bitmap (`*.pbm`), loaded with any plugin that provides `PbmImporter`