Merge pull request #2 from danzel/patch-1

Fix running on windows

better logging

missing instructions

fixing more minimagick library changes bugs

rake is a runtime dependency, image magick has had API changes

ideas

any 1.0 version will do

fixing builds as the dev dependencies have versions now too

lock it to 0.2.4 as 0.2.5 requires ruby 2.1

update rubygems and bundle update

update rubygems and bundle update

update development dependencies to have explicit versions

more details

using docker now