Documentation updates
Eliminate the RAX_REGION environment variable; iterate through all regions available to an account and present servers in region groups; default to using server name to identify servers in groups; set ansible_ssh_host key for each server; utilize the _meta key to provide all the hostvars for each server; all grouping by web, db, sql, lb, app based on server name; pretty print JSON output for some human-readable inventory action

Add set_setting to alleviate requirement that ~/.pyrax.cfg exists

Add regions as a optional env var to narrow our inventory scope

Clean up
Documentation updates for region env var
Accept a comma-separated list of regions
Remove grouping of hosts by trying to discern subdom in server name
Make creds file env var optional; look for ~/.rackspace_cloud_credentials if not supplied
Implement @cchurch suggestions
Move regions until after authentication; otherwise pyrax.regions is an empty tuple and no inventory is returned.
Only remove leading '0x' from key ids, not all 0s
Fix broken markdown syntax in changelog

Newlines aren't identified correctly. This made it more likely for
developers to miss changes for releases.
Merge pull request #4728 from JensRantil/fix-broken-changelog

Fix broken markdown syntax in changelog
Merge pull request #4727 from leth/apt-key-leading-zeros

Only remove leading '0x' from apt key ids, not all 0s
Revert 1f6edf7d76c66af0042dfc535b39785f2869dc19 and re-enable passing lists to yum and apt
Evaluate the conditional for each item for modules that normally try to group with_items results
like yum and apt.
Inventory directory should always be absolute.  Fixes #4535.
This allows variable references in playbooks in a different way.
Fix code typo.  I'll blame jet lag for now :)
Fix description of nova_compute:name option

It's the name of the instance, not of an image.
Merge pull request #4742 from sheldonh/devel

Fix description of nova_compute:name option
Merge pull request #4326 from angstwad/devel

Revamp of the rax.py inventory plugin