New Features
  - Richer lookup info in completions (by @Furyhunter).
 
  --explain hyperlinks links in console output (by @tov). 
  - Backtrace option in run configurations (by @tov).
 
  - Better typification for primitives, self, structs and enums.
 
  - Highlighting of markdown doc comments (by @mkaput).
 
  - Expand modules is now a quick fix instead of always applicable and annoying intention.
 
  - Better highlighting of references (by @mfarrugi).
 
Fixes
  - Don’t fail if 
cargo --version does not explicitly include stable (by @oistein). 
  - Parse inclusive range 
1 ... 3. 
Refactorings
  - Stubs for impl items.
 
  - Initial implementation of impl index.