Move Javelin to webroot
Summary:
This is a major pain on Windows and the main reason why Phabricator doesn't work there and is hard to fix.
The sad part is that Windows support symlinks (via MKLINK) but Git on Windows doesn't use them.
Test Plan: Loaded Phabricator on Windows without JS errors.
Reviewers: epriestley
Reviewed By: epriestley
CC: aran, Korvin
Differential Revision: https://secure.phabricator.com/D5458