Version v0.3.1. Fix 'creates' parameter bug in 'aws_tar_extract'.

+## 0.3.1 - 2016-11-28
+### Fixed
+- Fixed definition for 'aws_tar_extract' where it raises an exception if no 'creates' parameter is given.
+
 ## 0.3.0 - 2016-11-25
 ### Changed
 - 'dirs' attribute has been replaced with 'backups' which gives the option of creating multiple instances of the script, each having a different filename.

@@ -47,7 +47,7 @@ define :aws_tar_extract,
   include_recipe 'awscli'
   include_recipe 'tar'
 
-  unless ::File.exist?(params[:creates])
+  unless params[:creates].nil? || ::File.exist?(params[:creates])
 
     directory(tmp_dir) { recursive true }
     directory(params[:target_dir]) { recursive true }

@@ -4,7 +4,7 @@ maintainer_email 'sysadmin@chromedia.com'
 license          'Apache License'
 description      'Creates a script to backup directories into an S3 bucket.'
 long_description IO.read(File.join(File.dirname(__FILE__), 'README.md'))
-version          '0.3.0'
+version          '0.3.1'
 
 depends 'awscli', '~> 1.0.1'
 depends 'cron', '~> 1.7.4'