fix `NoMethodError: undefined method `[]' for nil:NilClass` if AMI has no description
Merge pull request #38 from tknerr/fix-status-for-aws-images

fix `NoMethodError: undefined method `[]' for nil:NilClass`...
bumped release to 0.19
travisci support
added travisci status images to readme
add default rake task
relaxing net-ssh dependency
hash.dup gives problems on ruby 1.9.3
roles & recipes are now added to the runlist
roles & recipes are now added to the runlist
update