check type of first argument for Worker#initialize to be an instance of ImageOptim
Handler.for to create instance, use inside a block, cleanup and return result
separate conditions from preproc registration and avoid LocalJumpError when breaking in railtie initializer block
flat style badges
notes about contributing
Merge branch 'readme-updates'
Merge pull request #50 from schnittchen/master

Fix LocalJumpError (Ruby 2.1.2, Rails 4.1.4)
make spec/images/orient/generate work from different directory
update generated comment message in readme
fix using ImagePath without ImageOptim:: namespace in image_optim_spec
move requirement for true_false_nil from runner.rb to bin/image_optim
extract true/false/nil conversion to TrueFalseNil.convert
Merge branch 'fixes'
getting pngquant version
checking pngquant version
pngquant worker (kudos to adammathys for #32 and smasry for #40)
add generated pngquant worker options to readme
add generator script and a 64 colour test png
add installation instructions for pngquant (linux, part of #32)
add installation instructions for pngquant (macports, part of #40)