Upgrade for language changes
Update Rust version
Update README.md

Fix link
Add back missing match line
Fix level-of-indirection problem in url
Update rust-azure, rust-freetype
Update tests for language changes
merge of mozilla's 0458783bc798737d6772784b5805b6deb1b6ba9f + @
merge of mozilla's de18b9b198b8b43e21b5fddf2dc208c1a234faa9
Merge commit 'f1b2463d48462efc53cbd11e446dffc175da7151' into android_build
merge of mozilla's ef0423d89a793316f4b755a6b340ae0fe733c056
Merge commit '6a92e841050c41140181441b0bd78ec88d31b5e6' into android_build