Add support for additional EXAMPLES string in Ansible modules

Added support for --check in zfs module

Fixed file-path in comment from examples.yml to intro_example.yml.

minor docs tweak: link directly to ec2 ini file

Fix diff output vertical spacing

Fixes #2165.

Adds 'chroot' connection for executing modules chrooted to
a local dir. Requires running ansible as root.

chroot dirs should be specified in the inventory like any
other host.

You can do things like:

$ sudo -E ansible -vvv -f 1 "./chroot1,./chroot2" -c chroot \
  all -m setup
$ sudo -E ansible-playbook -vvv -f 1 -i "./chroot1,./chroot2" \
  -c chroot some-playbook.yml

some-playbook.yml:
---
- hosts: all
  tasks:
    - name: echo something
      shell: echo "Yaaay!" >/tmp/foobar.txt
    - name: install less
      apt: pkg=less state=latest

* get_file_contents returns None when file is not available.
  When /etc/mtab is pointing to /proc/mounts and /proc is not
  mounted, mtab.split will traceback.

pause: Fix small documentation glitch

Added more users of ansible (TCHPC and DRI)

uri: load JSON for content-type: application/json

document
check prefix of content-type and merge dicts
amend doc
load JSON into 'json' subkey

Adding ec2-related module example to examples/playbooks

fixes freebsd setup issues with jails

teach apt module to support --check mode

Add support for security group id parameter ISSUE #2029

Prevents PATH, PYTHONPATH etc... to be re-added.

Add support for security group id parameter, remove default for group name (since AWS already sets a default). ISSUE #2029

Signed-off-by: Brian Coca <bcoca@tablethotels.com>

Fixes #2017.

mail module: properly set charset

sysctl module: fixed issue when checks_after fail on comparing keys with...

sysctl module: fixed issue when checks_after fail on comparing keys with values separated by white strings

sysctl module: fixed issue when checks_after fail on comparing keys with values separated by white strings