require shellwords in BinResolver::Bin as it is used there
convert path to string in BinResolver::Bin initializer as it is expected to be one
interface to image_optim_pack
temporary use image_optim_pack from github
remove installation of bins provided by image_optim_pack on travis
put traivis language: ruby in one line
redone code for creating copies in optimizing images spec
use path relative from root in description of it "optimizes ..." specs
remove use of image_optim_pack from github and depend on image_optim_pack ~> 0.1
Merge branch 'pack'

Conflicts:
	CHANGELOG.markdown
	image_optim.gemspec
tiny regorganization in travis script
fix style according to Style/MultilineOperationIndentation: indented
v0.18.0