This reduces chances of errors where consumers of strings mutate inputs
and reduces memory usage of the app.
Test suite passes now, but there may be some stuff left, so we will run
a few sites on a branch prior to merging
* Remove some outdated information from the guide
* Add scripts/osx_dev to bootstrap a working development environment
* Add a Brewfile to track binary dependencies
Sam Saffron
Joffrey JAFFEUX
Guo Xiang Tan
Marlon Andrade
Devin Rhode
Nick Ragaz