Batch: COOK-2755, COOK-2829, COOK-4091, COOK-3859, COOK-3467, COOK-2935, COOK-4213

COOK-2755:  Add allocate action to the elastic IP.  Author: jarias
https://github.com/opscode-cookbooks/aws/pull/24 

COOK-2829: Expose AWS credentials for ebs_raid LWRP as parameters.  Author: Lance French
https://github.com/opscode-cookbooks/aws/pull/39

COOK-4091: chef-solo compatibility.  Author: wormzer
https://github.com/opscode-cookbooks/aws/pull/44

, COOK-3859, COOK-3467, COOK-2935, COOK-4213

internal updates:
usage note from Sean Horn,  state_attrs from Allen Goodman.