Expose server attributes to playbooks.

This makes all of the launch-time attributes (e.g. disk_image_id,
launch_timeout_s, ssh_key_name, etc...) available as facts in case you
need them in a playbook.  They are all in a new fact namespace called
``bang_server_attributes``.
Highlight yaml example syntax
Highlight python example syntax
Highlight another yaml example
Highlight yaml hpcloud examples
Fixed aws security group handler
Changed to first delete SG rules and then create and changed from using group names to group ID
Support all the rightscale input types
Update version and release notes for 0.15
Add notes that map terms between providers
Add another rightscale input test scenario
Test for basename config specs
Move doc hosting to readthedocs.org
Document links to project resources
Hide old releases from table of contents
Add examples of SQS and SNS autoscaling data.

There's a sample of a plain ol' SQS message, an SQS message sent by
EC2 during an autoscaling *launch* event, and then the associated RSA
certificate (a.k.a. public key) used to verify the signature of the
launch event message.
Add notes about dispatcher feature
Add link to examples in README
Fix up grammar in README
Update configuration documentation