Fix deprecated pre command

Copied from [CoffeeScript](https://github.com/jashkenas/coffee-script-tmbundle/blob/master/Commands/Compile%20and%20Display%20JS.tmCommand#L10)
TextMate "Compile and Display" command works on files with imports

Without cd'ing to the current files' directory, Stylus imports would fail.
Merge branch 'pr/1034' into rc-0.34
Merge remote-tracking branch 'origin/pr/975' into rc-0.34

Conflicts:
	editors/Stylus.tmbundle/Commands/Compile and Display CSS.tmCommand