def env
      env_hash = {}
      env_hash["NODE_PATH"] = asset_paths unless uses_exorcist
      env_hash["NODE_ENV"] = config.node_env || Rails.env
      env_hash
    end
def env
      env_hash = {}
      env_hash["NODE_PATH"] = asset_paths unless uses_exorcist
      env_hash["NODE_ENV"] = config.node_env || Rails.env
      env_hash
    end
Environtment to run browserify in:

 NODE_PATH https://nodejs.org/api/all.html#all_loading_from_the_global_folders
 but basically allows one to have multiple locations for non-relative requires
 to be resolved to.

 NODE_ENV is set to the Rails.env. This is used by some modules to determine
 how to build. Example: https://facebook.github.io/react/downloads.html#npm