This is an implementation of introducing window management to Emacs.
  * Management of list of editable buffers
  * Assignment of windows for pop-up buffers
  * Switching window layout like the perspective in eclipse
  * Plug-in extension
 .
 The current implementation has following perspectives:
  * code : main coding layout
  * two : side by side layout
  * doc : reading documentation layout
  * dashboard : showing plug-ins like dashboard in Mac OSX
  * array : selecting buffers like expose in Mac OSX