Allow serving node_modules on /node_modules path. - This fixes a weird bug where a custom module would be unable to depend   on a brick /lib file because of the lack of a consistent path to that   file.
Allow serving node_modules on /node_modules path.
- This fixes a weird bug where a custom module would be unable to depend
  on a brick /lib file because of the lack of a consistent path to that
  file.

google/chicago-brick,google/chicago-brick,google/chicago-brick,google/chicago-brick