Adding updated values for recurring autoscale operations
Adding updated documentation for the new variables
Improve docs for EC2_run_image and Image_run

- Fill in missing parameter description
- Include new instance types
Fixed a bug where URIs were properly canonicalized in Sig V4 signatures.
Fixed a test failure involving connections.
Merge pull request #1489 from toastdriven/canonical-uri

Fixed a bug where URIs were properly canonicalized in Sig V4 signatures.
Add port to host header when necessary for signature V4
Added tests to verify the SigV4 port behavior.
Fix variable overwrite in build_put_params

Before this patch, the for loop at the bottom of `build_put_params`
would overwrite the passed in value variable, resulting in spurious
log messages:

    'You supplied a value and statistics for a metric. Posting
     statistics and not value.'

I've changed the variable name from value to val to prevent the
overwrite and stop the spurious log messages.
Added tests for the previous CloudWatch patch.
Merge pull request #1487 from arturhoo/ec2-doc-fix

Improve docs for EC2_run_image and Image_run
Updated Opsworks to add ELB support & handle the latest parameters.
Fix build break in cloudwatch test
Bump copyright to 2013 for cloudwatch unittest
Added config-based region support to DynamoDBv2.
Improved the way DynanmoDB v2 connections get created.
Added parallel scan support in DynamoDB v2.
Added an initial CONTRIBUTING doc (for GH).
Changed boto doc string to clarify that EU means European Union for GCS
Merge pull request #1494 from toastdriven/contributing

Added an initial CONTRIBUTING doc (for GH).