Fix typo in the aws repl commandline client help page
Merge pull request #630 from deiv/fix-aws-repl-commandline-interface-help-page

Fix typo in the aws repl commandline client help page
Fixed ArgumentError raise.

See #604
Reverted hash syntax to 1.8.7 compat format.
Resolved ruby 1.8 test issue.
Removed an un-supported API operation.

Closes #633
Removed docs for a non-existant method.

See #633
Added support to LaunchConfigurationCollection#create for :placement_tenancy.

Fixes #631
Removed lib/aws-sdk.rb from the `aws-sdk-v1` gem.

This was causing issues for users with the v2 `aws-sdk`
gem in the same application. If the v1 gem was loaded first,
then `require 'aws-sdk'` would not load v2.

See https://github.com/aws/aws-sdk-core-ruby/issues/119
Add a configurable number of retries to the EC2 credential provider

In cases where the EC2 provider is configured as the only valid provider
of credentials, intermittent failures are to be expected and can be
retried safely in order to avoid a credential error.