ec2_snapshot: fix for "unknown type number requested for wait_timeout"

apt_key: Output URL for debugging

Also added a new integration test for assemble using local assembly
with a delimiter.

This builds on GH-6359 and changes the logic so that a newline is only inserted between fragments if the previous fragment does not end with a newline.

* Catch issues with invalid regions
* Ensure we send string only data as meta values in the rax module
* Add public_key/lookup example for rax_keypair
* Clean up import statements

Add version_compare filter

rax.py inventory script improvements

Expose the playbook to callback plugins

Use common file argument system previously implemented by @sivel for rax modules on the file modules as well (copy/file/template).
Application to other cloud providers would make very good sense.

Fixes #6842

Treat 255 errors from raw as dark host

ssh: propagate prompt to _communicate()

Fix a typo in the subversion module documentation

formatting

Add counter

Fixes #6801
Fixes #6832

Fix _parse_value always returning 0 when not true, false or None.

rax_files fix -- small idempotency fix

Update cron module documentation. The 'name' parameter is required.

Fix issue #6812: directory_mode does not work