Extend ruby ctags to make it recognize tasks and namespaces from Rakefiles and Capistrano files.
--regex-Ruby=/(^|^[[:blank:]]*)task[ \t\:']*([A-Za-z0-9_]*)/\2/t,tasks/
--regex-Ruby=/(^|^[[:blank:]]*)namespace[ \t\:]*([A-Za-z0-9_]*)/\2/n,namespaces/