This is the last PR for moving the YAML/JSON sample files. There still need some follow up PRs to: - rename the `codenew` shortcode to `code`. - move the examples_test.go to where it really belongs.
Fix link, old link to Profiling_with_tools was 404.
* Fix up Tutorials landing page and Tutorials left nav. * Add redirects. Fix bullet.
This commit converts content and layout to use Hugo.