SublimeCodeIntel in Sublime Text 3

Update: Forget about SublimeCodeIntel and use the new CodeComplice package instead. There is now a Sublime Text 3 compatible version of SublimeCodeIntel, thanks to the hard work of Germán M. Bravo (aka Kronuz). I had a job getting it to correctly index my project files though. I’m posting here what I did, in the hopes it’ll help …