Merge pull request #5020 from damycra/django_manage_migrate_changed_filter

Reports changed status from django_manage migrate
Fixes #5021 safely split hostkeys with quotes
Added existing_only options to skip creating new files on receiver
Nova doesn't attempt to auth on obj instantiation

Need to call nova.authenticate() to validate credentials.
add a topical guide for Vagrant integration
fix up word wrapping
remove Vagrant from the list of pending topics
fix typo in deprecation warning
Merge pull request #5034 from zanardo/fix-typo

fix typo in deprecation warning
elaborate on a couple of sections
Merge pull request #5033 from tgerla/vagrantguide

Add a basic guide describing Vagrant and Ansible
Remove Python 2.4-incompatible 'with' statement
Improved documentation of `mount` module

Mentioning the fact that mount point directories are created and
removed.
synchronize: allow ansible_ssh_host to be templated

This is already enabled in the runner also.
Fixes 5036 add missing parameter to git module function call
Addresses #5036 fix typo in git module
Fixes #5031 Template the delay value and cast to float for loops
Fixes #4979 Check for the correct context when inside the inventory_hostnames plugin
Merge pull request #5045 from junegunn/wait_for-python2.4

Remove Python 2.4-incompatible 'with' statement
Update unarchive

Modified argument order provided to unzip command as the -o was being interpreted as a file.