Add the option to retry spot requests if they were rejected with
price-too-low.
Fix pep8.
Fix more pep8.
Add explicit reset of spot price. Document recent changes.
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Fix merge conflict with upstream.
Fix missing parameter. Add test for product description propagation.
Add test for retry parameter propagation.
Actually make spot instance tests test spot instances.
Make ec2 tests actually test something.
Merge remote-tracking branch 'upstream/master'
Add dummy test to check retrying spot requests.
Merge InitHello/buildbot:master (PR #1076)

Minus permissions changes to many files and a change of .coveragerc from
a symlink to its target; all changes added in 7a5bd13.