RMagick 0.9.1
    o Add -Wl,rpath option to $LDFLAGS in extconf.rb
    o #include <sys/types.h> in rmagick.h (Thanks to Akinori Musha!)
    o Call SetMagickResourceLimit instead of SetCacheThreshold
    o Clone texture image in Image_texture_flood_fill instead of adding a reference
    o Many fixes to the Array methods in ImageList
    o Defined Image#<=>, defined Image#== in terms of Image#<=>
    o Defined ImageList#<=> in terms of Image#<=>

RMagick 0.9.0
    1st beta
