Also standardizes capitalization of Rake.

Update links that were redirected or throw
404 errors

Another MR to add languages to code blocks.

Without proper spacing, codeblocks will not color
correctly, so this aligns all codeblocks with the
list items they are nested beneath

- Move files to Project/* namespace
- Move files to Group/* namespace
- Fix specs

[8c06de12f7a] Apply suggestion
[a2b2517464a] Apply suggestion to import_project.md

Find and replace sh with shell

Also added note about silent errors and import_failures