* Added a sha256 method to module_common
* Added a sha256sum parameter to the get_url module to enable
cryptographic verification of downloaded files
* Fixed a few typos in the documentation
Setting version_added for this feature to 1.3
Added placement_group parameter for cluster compute.
Document the 'default' argument for vars_prompt.
Fixed a few small typos
Remove debug statement.
Merge branch 'sha256' of git://github.com/jlund/ansible into devel

Conflicts:
	library/network/get_url
Merge pull request #3251 from jlund/sucess-typo-fix

Fixed a few small typos
Merge pull request #3247 from SirScott/vars_prompt_docs

Document the 'default' argument for vars_prompt.
Merge pull request #3236 from lwade/ec2_placementzone

Added placement_group parameter for cluster compute. Issue 3232.