Set 'scriptencoding'
Use augroup for filetype.
Remove needless Rust filetype config.

This repository has a official rust configuration!
Merge branch 'master' into plugins

* master:
  Remove needless Rust filetype config.
  Use augroup for filetype.
  Set 'scriptencoding'
Merge branch 'plugins' into office

* plugins:
  Remove needless Rust filetype config.
  Use augroup for filetype.
  Set 'scriptencoding'

Conflicts:
	vimfiles/ftdetect/filetype.vim