Update directory structure of initialization scripts.
    
    - Previously, initialization scripts were stored in the root directory
      of tcar-scripts branch. This is is inappropriate when the
      tcar-scripts branch is merged into tcar branch. In order to provide
      a better organization, this update creates the Scripts directory and
      move initialization and function scripts into it.
    
    - Previously, documentation files related to automation scripts were
      stored in the Manuals directory in the root directory of
      tcar-scripts branch. This is inappropriate when the tcar-scripts
      branch is merged into tcar branch. In order to provide a better
      organization, this update creates the Documentation/Manpages and
      Documentation/Understanding_Modules directories and moves
      documentation files related to automation scripts into them,
      appropriately.