Adds more compute Pyrax examples

- flavor list, flavor from list
- server build query
- delete server
- image list, image from list
Add images GS

author: diane fleming
Images GS

author: diane fleming
Updates to images GS
Code samples - images GS

author: diane fleming
Clean up concepts - images GS
formatting
Remove DS_Store and add gitignore and add back authentication.rst in compute
Update code samples / images

author: diane fleming
Merge pull request #69 from annegentle/py-compute

Adds more compute Pyrax examples
Merge pull request #29 from dian4554/image-gs

Add images GS
[#73] Adding dev-specific configuration.
Merge pull request #83 from ycombinator/master

[fixes #73] Adding dev-specific configuration.
s/true/yes/ per Ansible documentation.
Merge pull request #84 from ycombinator/master

s/true/yes/ per Ansible documentation.
Cleaning up playbooks.
Merge pull request #85 from ycombinator/master

Cleaning up playbooks.
[#74] Updating production web site playbook to take region as input via env var.
[#74] Simplifying.
[#74] Assuming python interpreter is available everywhere in /usr/bin/python