Added ability to start and stop existing EC2 instances.
Add rule group_name parameter whose value can reference containing group name.
Check for group_name and cidr_ip.
Added ability to create EC2 volume from snapshot

ec2_vol module now takes optional snapshot argument
Added relevant module argument handler and documentation
Simplified p.poll handling
Add hints about what data goes into the variable

It's not immediately obvious what all can be accessed from the register
variable. Breadcrumbs to use -v would help.
Added the ability to add volumes to instances at creation time

This allows a volume to be cloned from a snapshot, a brand new
volume to be created, or an ephemeral volumes to be associated
at time of instance creation.

This avoids any race conditions associated with creating extra volumes
after instance creation (e.g. writes happening before the volume is
mounted).

In addition, this allows the root volume to be edited
Fixing *_plugins configuration names and values

Based on reading of Developing Plugins and the example ansible.cfg file, it seems the sections changed here were created in error by a copy and paste.
Merge pull request #5770 from miksago/patch-1

Fixing *_plugins configuration names and values
Add the start of a coding guidelines document.
Update some things in coding guidelines.
Add note about tests, etc.
Missing colon.
Fix exception being thrown for new instance

Currently if we are trying to register an instance that has not yet
been registered with the elb an exception is thrown.
Merge pull request #4534 from willthames/ec2_mount_volumes

Added the ability to add EBS volumes to EC2 instances at creation time
Fixing traceback caused by incorrect argument passing to json.dumps

Fixes #5756
Update wait_for documentation - remove extra quote

The timeout is in seconds (int), and the extra quote at the end could throw someone off if they're copying and pasting the example.
Merge pull request #5783 from jimi-c/issue_5756

Fixing traceback caused by incorrect argument passing to json.dumps
sysctl: parse bool value as 0/1 and refactor a little bit
Merge pull request #5380 from dhml/devel

ec2_group: rules can't reference containing group fix #5309