requiring open3 which fixes the heroku cedar error
Merge pull request #11 from danielsz/master

Requiring 'open3' in command.rb
updated documentation to thank Daniel Szmulewicz for a code contribution
Version bump to 0.4.3
Regenerate gemspec for version 0.4.3
added require "timeout"

was necessary when using puma.io
Merge pull request #12 from johnrees/patch-1

added require "timeout"
updated README
new 'world_readable_tempfile' option
add release notes
link to release notes in the readme
Version bump to 1.0.0
Regenerate gemspec for version 1.0.0
doc update
doc update
doc update
add backwards compatibility with ruby 1.8.7
preserve background transparency on shape=cut operation
Merge pull request #15 from gordonc/master

some fixes for backwards compatibility and transparencies
fix tests