This patch provides baseline documentation for the work to be done on the 
pluggable-db branch.  It is merely a slight reformatting of the documentation
presented during the original "gat fs-refactor" effort at:
http://www.cdrguys.com/subversion/index.html

NOTE: The next installment of the pluggable-db (db_cntxt) is being delayed 
      while this design documentation is being updated.
      The baseline documentation should make it easier to identify any design 
      changes that occur going forward.

* notes/pluggable-db/curFSSmplViewImg.jpg (New)
  A simplified view of current FS layers.
  
* notes/pluggable-db/finalFSSmplViewImg.jpg (New)
  A simplified view of proposed FS layers.

* notes/pluggable-db/pluggable-db.html (New)
  A brief description of work previously done off-line.


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/pluggable-db@845407 13f79535-47bb-0310-9956-ffa450edef68