def add(glob, options)
      definition << options.merge(:glob => glob)
    end
Public: Include files in the bundle.

To add all files in "root" to the root of the bundle:
add("root/*")

To add all files other than files that start with "." to the root of the bundle:
add("root/*", :ignore_hidden => true)

To add all files in "lib" to "vendor/lib":
add("lib/*", :prefix => "vendor/lib")
add("lib", :prefix => "vendor")