Fix default gravity in MiniMagick resize_and_pad
Adding support for jRuby.
supported rspec3 matcher protocols
Merge pull request #1377 from lephyrius/jruby-support

Adding support for jRuby.
Merge pull request #1358 from abevoelker/fix_minimagick_resize_and_pad

Fix default gravity in MiniMagick resize_and_pad helper
Merge pull request #1370 from akiomik/feature/support-rspec3

supported rspec3 matcher protocols