History.md updates.
Use newer awssum
oauth1: Don't try to render results after sending a redirect.

This now causes an error, but was always wrong.
Update examples to 0.6.4-rc1.
Update docs to 0.6.4-rc1.
Bump example version numbers for QA testing.
metadata updates for 0.6.4
banner text tweak.
bump release number in docs and examples.
Merge branch 'release-0.6.4'
Merge branch 'master' into devel