Changes:
2019-04-16 vadimsh@chromium.org [lucicfg] Allow to use relative paths in load(...) and exec(...).
2019-04-16 vadimsh@chromium.org [lucicfg] Remove config_set meta option, finish declare_config_set.
2019-04-13 vadimsh@chromium.org [lucicfg] Parallel validation of multiple config sets.
2019-04-12 vadimsh@chromium.org [lucicfg] Add ctx.declare_config_set(...) API.
2019-04-12 vadimsh@chromium.org [lucicfg] Convert Output from a map alias to a struct.
2019-04-12 vadimsh@chromium.org [lucicfg] Use ctx.output instead of ctx.config_set in generators.
2019-04-11 vadimsh@chromium.org [lucicfg] Start refactoring to support multiple output config sets.
2019-04-11 vadimsh@chromium.org [starlark] Fix tests after recent go.starlark.net roll.
2019-04-10 vadimsh@chromium.org [lucicfg] Finish the doc.
2019-04-09 vadimsh@chromium.org [lucicfg] Add a doc for "migrating from existing configs".
2019-04-09 vadimsh@chromium.org [lucicfg] Add examples of realistic lucicfg configs.
2019-04-05 vadimsh@chromium.org [lucicfg] Write an introduction doc.
2019-04-05 vadimsh@chromium.org [lucicfg] Write "Defining cron schedules" doc.
2019-04-05 seanabraham@chromium.org Improve emit_defaults documentation.
2019-04-04 nodir@google.com [buildbucket] Move config protos

R=tandrii@chromium.org
BUG=945048

Change-Id: I250c13fee50fbc963d44fccef1cba3510e834905
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1570412
Commit-Queue: Vadim Shtayura <vadimsh@chromium.org>
Commit-Queue: Andrii Shyshkalov <tandrii@chromium.org>
Auto-Submit: Vadim Shtayura <vadimsh@chromium.org>
Reviewed-by: Andrii Shyshkalov <tandrii@chromium.org>