Add description about SITE_ROOT in settings_locals.py.tmpl
Add description about SITE_ROOT in settings_locals.py.tmpl

Patch from Benoît Allard to add a commented-out SITE_ROOT to the
settings_local.py template.

It tooks me half a day to discover that really useful line in the settings.py,
simply because I understood that file was for internal Django config, and that
no-one wanted to modify it. I finally felt on Christian's blog explaining that
setting and then read it in the settings.py file.

Such a setting should be accessible to people configuring their install of
reviewboard.

Reviewed at http://reviews.review-board.org/r/556/



beol/reviewboard,reviewboard/reviewboard,1tush/reviewboard,atagar/ReviewBoard,Khan/reviewboard,chipx86/reviewboard,sgallagher/reviewboard,atagar/ReviewBoard,KnowNo/reviewboard,reviewboard/reviewboard,chipx86/reviewboard,Khan/reviewboard,brennie/reviewboard,1tush/reviewboard,beol/reviewboard,sgallagher/reviewboard,brennie/reviewboard,custode/reviewboard,1tush/reviewboard,chazy/reviewboard,chazy/reviewboard,custode/reviewboard,custode/reviewboard,chazy/reviewboard,bkochendorfer/reviewboard,bkochendorfer/reviewboard,asutherland/opc-reviewboard,Khan/reviewboard,davidt/reviewboard,1tush/reviewboard,1tush/reviewboard,chipx86/reviewboard,KnowNo/reviewboard,Khan/reviewboard,atagar/ReviewBoard,1tush/reviewboard,reviewboard/reviewboard,chazy/reviewboard,atagar/ReviewBoard,bkochendorfer/reviewboard,KnowNo/reviewboard,chipx86/reviewboard,bkochendorfer/reviewboard,1tush/reviewboard,davidt/reviewboard,atagar/ReviewBoard,beol/reviewboard,brennie/reviewboard,sgallagher/reviewboard,davidt/reviewboard,1tush/reviewboard,atagar/ReviewBoard,chazy/reviewboard,sgallagher/reviewboard,beol/reviewboard,Khan/reviewboard,Khan/reviewboard,atagar/ReviewBoard,atagar/ReviewBoard,chazy/reviewboard,chazy/reviewboard,Khan/reviewboard,reviewboard/reviewboard,davidt/reviewboard,Khan/reviewboard,asutherland/opc-reviewboard,KnowNo/reviewboard,chazy/reviewboard,atagar/ReviewBoard,brennie/reviewboard,1tush/reviewboard,asutherland/opc-reviewboard,chazy/reviewboard,asutherland/opc-reviewboard,Khan/reviewboard,custode/reviewboard