2.21.1 bugfix release * Fix Make rule used to build the library. * Run syntax checks from the Makefile. * Add ability to build release tarballs from Make. * Add support for dependencies on more native libraries: - libaudio.so.2 - libcrypt.so.1 - libFAudio.so.0 - libgomp.so.1 - liblcms2.so.2 - libpixman-1.so.0 - libSDL_kitchensink.so.1 - libSDL_sound-1.0.so.1 - libsigc-2.0.so.0 - libvorbisenc.so.2 - libX11-xcb.so.1 - libxcb.so.1 - libxcb-randr.so.0 * Add support for dependencies on more Mono libraries: - OpenTK.dll - OpenTK.Compatibility.dll - OpenTK.GLControl.dll * Prevent non-fatal errors when listing package dependencies. * Fix the error displayed when no supported archive is found. * Add support for "image/x-xpixmap" MIME type for icons.