branch 0.1 off, add dev vips
branch 0.1 off, add dev vips

now looks for dev vips (7.29) ready for new mem min stuff to go in

househappy/ruby-vips,mariovisic/ruby-vips,jcupitt/ruby-vips,househappy/ruby-vips,jcupitt/ruby-vips,househappy/ruby-vips,househappy/ruby-vips,mariovisic/ruby-vips,cloudinary/ruby-vips,cloudinary/ruby-vips