Removed the manifest file + task.

Using a Dir.glob() is much easier when dealing with a bunch of generated files.

task/manifest.rake

@@ -1,8 +0,0 @@
-desc 'Generates the MANIFEST file'
-task :manifest => [:generate] do
-  files  = FILE_LIST.to_a.sort
-  handle = File.open(File.expand_path('../../MANIFEST', __FILE__), 'w')
-
-  handle.write(files.join("\n"))
-  handle.close
-end