Get rid of all references to SOURCE_ROOT.
Get rid of all references to SOURCE_ROOT.

antek-drzewiecki/passenger,cgvarela/passenger,jawj/passenger,antek-drzewiecki/passenger,kewaunited/passenger,clemensg/passenger,phusion/passenger,phusion/passenger,phusion/passenger,kewaunited/passenger,pkmiec/passenger,antek-drzewiecki/passenger,clemensg/passenger,cgvarela/passenger,kewaunited/passenger,cgvarela/passenger,pkmiec/passenger,clemensg/passenger,antek-drzewiecki/passenger,jawj/passenger,kewaunited/passenger,kewaunited/passenger,bf4/passenger,pkmiec/passenger,clemensg/passenger,kewaunited/passenger,antek-drzewiecki/passenger,jawj/passenger,clemensg/passenger,kewaunited/passenger,antek-drzewiecki/passenger,phusion/passenger,jawj/passenger,jawj/passenger,bf4/passenger,pkmiec/passenger,jawj/passenger,clemensg/passenger,phusion/passenger,phusion/passenger,bf4/passenger,cgvarela/passenger,pkmiec/passenger,bf4/passenger,cgvarela/passenger,bf4/passenger,clemensg/passenger,cgvarela/passenger,kewaunited/passenger,phusion/passenger,jawj/passenger,bf4/passenger,cgvarela/passenger,bf4/passenger,antek-drzewiecki/passenger,antek-drzewiecki/passenger,cgvarela/passenger,phusion/passenger,clemensg/passenger,pkmiec/passenger,pkmiec/passenger