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

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

postgresql_user: Add support for PUBLIC

This change enables users to add and remove permissions to all roles,
using the PUBLIC user. This is equivalent to using the PUBLIC keyword
in GRANT and DENY postgres SQL commands.

For example, see: <http://www.postgresql.org/docs/current/interactive/sql-grant.html>

Fixes #1833

uri module doc fixes

Fixed remove_key

Correct ec2_vol doc errors

zfs: documentation no longer breaks the formatting in webdocs

Fixing syntax error

running install_lib
byte-compiling /usr/lib/python2.6/site-packages/ansible/runner/action_plugins/add_host.py to add_host.pyc
SyntaxError: ('invalid syntax', ('/usr/lib/python2.6/site-packages/ansible/runner/action_plugins/add_host.py', 37, 92, '    def run(self, conn, tmp, module_name, module_args, inject, complex_args=None, **kwargs)\n'))