gui: configurable synchronization between file browser and octave directory * default-qt-settings: all settings of the file browser are now located in its section, new setting sync_octave_directory * files-dock-widget.cc(constructor): make QToolBar and QAction variables local, add two buttons for syncing from octave to file browser and vice versa, change status-tips into tool-tips * files-dock-widget.cc(set_current_directory): do not emit signal displayed_directory_changed (would change octave dir) * files-dock-widget.cc(do_sync_octave_directory): new function for manually setting the octave dir to the one in the file browser * files-dock-widget.cc(do_sync_browser_directory): new function for manually setting the file browser to the octave directory * files-dock-widget.cc(update_octave_directory): new function called from the main-window when the octave directory has changed * files-doc-widget.cc(display_directory): new second parameter (bool, default is true) determining whether the signal with the new displayed directory should be emitted if synchronizing is enabled * files-dock-widget.cc(notice-settings): read new setting, enalbe or disable the sync buttons and set file browser to octave directory depending on setting * files-dock-widget.h: removed QToolBar and QAction variibles, new varaibles for storing the actual octave directory and whether syncing is desired or not, new functions (do_sync_octave_directory, do_sync_browser_directory, update_octave_directory), function display_directory with second parameter (bool, default true) * libgui/src/icons/ok.png,libgui/src/icons/reload.png: new icons for the toolbar * main-window.cc(change_directory): call new function update_octave_directory instead of display_directory * main-window.cc(construct-window-menu): rename "Current Directory" into "File Browser" * libgui/src/module.mk: new files icons/ok.png and icons/reload.png * settings-dialog.cc(constructor,write_changed_settings): all files-dock-widgets settings in a section, new setting sync_octave_directory * settings-dialog.ui: new setting sync_octave_directory

      DOUBLE PRECISION FUNCTION DDANRM (NEQ, V, WT, RPAR, IPAR)
C***BEGIN PROLOGUE  DDANRM
C***SUBSIDIARY
C***PURPOSE  Compute vector norm for DDASSL.
C***LIBRARY   SLATEC (DASSL)
C***TYPE      DOUBLE PRECISION (SDANRM-S, DDANRM-D)
C***AUTHOR  PETZOLD, LINDA R., (LLNL)
C***DESCRIPTION
C-----------------------------------------------------------------------
C     THIS FUNCTION ROUTINE COMPUTES THE WEIGHTED
C     ROOT-MEAN-SQUARE NORM OF THE VECTOR OF LENGTH
C     NEQ CONTAINED IN THE ARRAY V,WITH WEIGHTS
C     CONTAINED IN THE ARRAY WT OF LENGTH NEQ.
C        DDANRM=SQRT((1/NEQ)*SUM(V(I)/WT(I))**2)
C-----------------------------------------------------------------------
C***ROUTINES CALLED  (NONE)
C***REVISION HISTORY  (YYMMDD)
C   830315  DATE WRITTEN
C   901009  Finished conversion to SLATEC 4.0 format (F.N.Fritsch)
C   901019  Merged changes made by C. Ulrich with SLATEC 4.0 format.
C   901026  Added explicit declarations for all variables and minor
C           cosmetic changes to prologue.  (FNF)
C***END PROLOGUE  DDANRM
C
      INTEGER  NEQ, IPAR(*)
      DOUBLE PRECISION  V(NEQ), WT(NEQ), RPAR(*)
C
      INTEGER  I
      DOUBLE PRECISION  SUM, VMAX
C
C***FIRST EXECUTABLE STATEMENT  DDANRM
      DDANRM = 0.0D0
      VMAX = 0.0D0
      DO 10 I = 1,NEQ
        IF(ABS(V(I)/WT(I)) .GT. VMAX) VMAX = ABS(V(I)/WT(I))
10      CONTINUE
      IF(VMAX .LE. 0.0D0) GO TO 30
      SUM = 0.0D0
      DO 20 I = 1,NEQ
20      SUM = SUM + ((V(I)/WT(I))/VMAX)**2
      DDANRM = VMAX*SQRT(SUM/NEQ)
30    CONTINUE
      RETURN
C------END OF FUNCTION DDANRM------
      END