Fix grammar in password
Documents the --step and --start-at options to ansible-playbook. Fixes #9041.
adding for loop on list to to handle the return of none when the list is empty. With the previous method if the list was empty the script died. See http://stackoverflow.com/questions/18852324/typeerror-sequence-item-0-expected-string-nonetype-found
Google: allow for different libcloud provider to support upcoming DNS module
updated ref to core with updated cloud sublcases with __init__.py
Merge pull request #9489 from bcoca/cloud_modules_packaging_fix

updated ref to core with updated cloud sublcases with __init__.py
updated to latest core module, another init/packing issue, should be
last
Merge pull request #9492 from bcoca/updated_from_core_init_utitilties

updated to latest core module
Submodule update for docs reorg of module subcategories.
Fix note about video length

Perhaps due to update mentioned at /resources page, the video is 34
minutes long.
Adding new playbook objects for v2

* Playbook
* TaskInclude
Fix path to the integration tests

"tests/integration" -> "test/integration"
Merge pull request #9500 from alexandershov/devel

Fix path to the integration tests in docsite
add documentation for the delegate_to magic variable
Merge pull request #9502 from nikut/delegate_docfix

add documentation for the delegate_to magic variable
changed examples to not have a  non working variable that gets confused
with directives as per #9264
Merge pull request #9503 from bcoca/doc_fix_uservar

changed examples to not have a  non working variable
added error handling on private key stat in case it is saved in agent
but not in filesystem
Merge pull request #9509 from bcoca/no_ssh_fail_missing_keyfile

added error handling on private key stat in case it is saved in agent
fixed ssh fix, bad test case but it should work now