Update `texinfo' documentation backend inside `help' functionality.
    
        help.sh
    
            - Introduce FLAG_STYLE variable. This variable controls the
              way chapter and section definition titles are displyed.
    
            - Stop using `cli_commitRepoChanges' as last subversion
              action.  Instead, start using `cli_syncroRepoChanges'. All
              deleting actions are applied through subversion, so update
              actions over deleted files won't restore them back into the
              working copy.
    
        help_getOptions.sh
    
            - Add support for `--style' option. This option controls the
              value of FLAG_STYLE variable.
    
        Texinfo/texinfo_updateSectionNodes.sh
    
            - Define NODE, SECT, CIND and INCL as local variables.
    
            - Escape slashes before expanding node, section and concept
              index to prevent them from being interpreted as separator
              characters when the variables be expanded inside sed's
              replacement space.
    
            - Change sed's separator character from `!' to `/'.
    
        Texinfo/texinfo_createChapter.sh
    
            - Start using `texinfo_getEntryIndex' functionality.
    
            - Escape slashes before expanding node, section and concept
              index to prevent them from being interpreted as separator
              characters when the variables be expanded inside sed's
              replacement space.
    
        Texinfo/texinfo_createStructure.sh
    
            - Redefine MANUAL_CHANGED_DIRS to use MANUAL_BASEDIR.
    
        The following files were added:
    
            - Texinfo/texinfo_getEntryIndex.sh
            - Texinfo/texinfo_getEntryTitle.sh