Replaced right_aws dependency with aws-sdk gem, adds security tokens support
Removed some end line whitespaces
Read credentials from IAM role by default
Config#config_from_ohai method refactored, Config::Ohai class created
Gemspec: force nokogiri version to ~> 1.5.0, to remain compatible with Ruby 1.8
Gemfile: add_development_dependency for Ruby 1.8 compat now checks ruby version
Chef::Handler::Sns#test_0012 fixed to avoid "unexpected invocation" failure
Chef::Handler::Sns#test_0012 fixed to avoid "unexpected invocation" failure with IO#read
README: Requirementes section completed due to aws-sdk change
Fixed Chef::Handler::Sns#test_0012_should test "TypeError: cant convert nil into String" random error
Added tests for Chef::Handler::Sns::Config::Ohai class
travis.yml: added Ruby 2.1
README: Added note about IAM roles
LICENSE: brackets replaced by copyright owner
More tests added for Config#config_check and Config#config_from_ohai methods
deleted .test_chef_handler_sns_config.rb.swp file
Adde more documentation about IAM roles
README: added IAM roles link
README: IAM roles link changed to point to IAM user guide
README: included Amazon SNS description