Fix SiteCatalyst link
Update AWS OpsWorks service
Bump version to v1.4.1
Format timestamp headers correctly
Lock to jshint 2.1.0
Merge pull request #141 from fhahn/master

Format timestamp headers correctly
Add example to create tags for new instances on EC2

Closes #140
Add debugging info for hostname and region in networking errors

References #145
Update IAM API
Update EMR API to use SigV4 and JSON
Update Redshift API for snapshot operations
Add support for SNS mobile push
Log error and exit if exception is raised from a callback

References #74
Bump version to v1.5.0