The licenses end up in the PO files, causing extra unnecessary for work
our translators. We save about 300 lines from each PO file with this.
This also solves another small problem: when a file is included with an
anchor, other anchors are automatically stripped away. This removes some
confusing `// ANCHOR: foo` and `// ANCHOR_END: foo` lines in the
solutions.
* Fix solution in Link Checker in Concurrency Morning exercises.
This change fixes the following issues with the current solution:
1. It is not listed on the "solutions" page.
2. It is not multi-threaded and does not use channels.
---------
Co-authored-by: Dustin J. Mitchell <djmitche@google.com>
* Align outline with new spin-off course structure
With the new structure, the section on Android is a spin-off course
from the main 3-day course on Rust Fundamentals. The Bare-metal and
Concurrency days are spin-off courses in the same way.
* Explain new course structure
* Align Bare-Metal welcome page with other deep dives
* Merge Day 4 page into Course Structure page
* Remove Day 4 Welcome page
This aligns the Concurrency in Rust section with the Bare-Metal Rust
deep dive.
* Show subsections for Android deep dive
This aligns the Rust in Android section with the other deep dives.
* Clean up welcome page and README
We now cover async Rust and the course is no longer a four day course.
* Remove reference to the old Day 4
* Remove Day 4 references from exercises
