bundle with --deployment so gems are installed locally
explicitly specify inno's installation path so it ends up in a consistent location
get rid of winemenubuilder exe wrapper, use .so as .exe. seems to be what works on linux
pass --init to wineboot. doesn't seem to make a different but looks like the right thing to do
remove winetricks dependency by setting macdriver directly with regedit
nothing really
use Xvfb so we can run headless
clear previous wineprefix on init-wine