Also simplified the first lines of some package docs
to focus on what the package provides instead of
explaining the implementation details.
Co-authored-by: Tyler Yahn <MrAlias@users.noreply.github.com>
* Update License header for all source files
- Add Apache 2.0 header to source files that did not have one.
- Update all existing headers dated to 2019 to be 2020
- Remove comma from License header to comply with the Apache 2.0
guidelines.
* Update Copyright notice
Use the standard Copyright notices outlined by the
[CNCF](https://github.com/cncf/foundation/blob/master/copyright-notices.md#copyright-notices)
