Various typo and stylistic changes to turbo.sh

* Be consistent with apt-get args
* 'apt-get -qq' implies -y
* Various bash stylistic and defensive programming updates (e.g.
  improved quoting)
* Reverse 'noedit' check so salt-call only needs to be mentioned once.
Remove legacy (precise) osrm dependencies
Correctly make parent dir for osrm
Merge pull request #16 from mattcen/master

Fixes to install process