- moved linux agents to a new node pool (basically renamed old one)
- removed some out of date scripts or moved them to playlists
- removed shell scrips invoked from jenkins
- minor docs updates
Some python classes methods are not used anymore and will be cleaned up
separately.
- move "user_doc" to "README" as it's publicly facing page visible when one opens repo
- move developer docs to "development"
- update docs to reflect current buildkite setup (not completely)
- grammar
