docs: Update example, no need to disable cert validation.
docs: Stub out Exoscale and Ikoula driver docs.
SLicehost isn't a thing anymore

Signed-off-by: Tomaz Muraus <tomaz@apache.org>
Make script executable.
Re-generate documentation fixtures.
docs: Add costrings conventions section (moved from the site).
Bump API version used by EC2 driver to 2013-10-15 and update affected test
fixtures.
Add ex_get_limits method to EC2 driver.
Update CHANGES.
Update us-west-1 region in the EC2 driver to include c3 instance types.
Also include pricing information.

Reference: https://twitter.com/awscloud/status/412873932828442624
Update CHANGES.
Update CHANGES file to use a more consistent style. This way file can more
easily be processed automatically by different tools.
Update CHANGES.
Add a script for generating a Markdown formatted list of contributors from the
CHANGES file.