hardcode attributes when used in tests
move aws tools to be nested under /usr/local/share/aws_tools directory
  - move the credential file into the root of this directory
  - DRY and simplify the /etc/profile.d/*.sh files that relate to this
change the name of aws_credentials file to just credentials
fix references to other attributes from with attributes/default.rb
refactor more specs to avoid using attributes; fix some attributes
update the readme
bump to version 3.0.0 (mistakes with attributes required more major refactoring)
Merge pull request #2 from Lytro/fix_aws_credentials

Fix aws credentials