Mono-D 2.0 - XamarinStudio 5.0 support, completion improvements

[Jack Applegame via Digitalmars-d-announce]

At first, thank you.

There is an issue with Diet templates highlighting. It's very 
poor.

Just compare

Mono-D 2.0.1/Xamarian Studio 5.0 - http://a-rei.ru/eNhp
Sublime Text 3 - http://a-rei.ru/vuoY