fix an issue created by commit 2954. Gerbview: display now an indicator of layers in use. minor code cleanup.

Change in CvPcb: CvPcb does not use now .dcm files, only .mod files  to read modules keywords and doc

commit patch from Kenta Yonekura (adding Japanese language) and add  Kenta Yonekura to translator list in about dialog

Add edit menu and right-click menu items to pcbnew for resetting module and other text field sizes to current defaults set in Preferences->Dimensions->Texts and Drawings.

Eeschema: cleaning code. Start work to enhance annotation algorithm.
Already added an option to annotate using sheet number (sheet 1 uses numbers 100 to 199, sheet 2 uses 200 to 299..).
Works fine if deleting existing annotation, but needs work to be used when the existing annotation is kept .

    Added: in file dialog, multiple file selection.
    Added: Draw mode selector (in left toolbar):
        Raw mode:
            a Gerber image is drawn on screen without buffering.
            Artifacts happen if there are negative items drawn, if more than one  Gerber file is shown.
        Stacked mode:
            each Geber image is drawn in a buffer and after drawn on screen
            No artifact with negative items.
            Each Gerber image covers previous images.
        OR mode (transparency mode):
            each Geber image is drawn in a buffer and after drawn on screen
            No artifact with negative items.
            Each Gerber image is "ORed" with previous images, like in Pcbnew.
    Try to optimize Draw function in buffered modes.
        (Useful for PC that have problems with "blit" graphic function)
    Fix minor issues.

* reverted clock ( --<| ) as it is commonly used for inverted clock in x-USSR
* nonlogic       ( ---X ) for non-logic pins of logic ICs (commonly used for power and timing RC pins).

Pcbnew:   Added grid origin patch from Lorenzo Marcantonio.   Converted set grid dialog from DialogBlocks to wxFormBuilder,  and added in this dialog the grid origin parameters settings.

Updated denis dupeyron email address

This patch applies on the very last svn  (r2402) and removes all
disfunctionnal python code (including deletion of unused strings)

    * in variable names, change non existent word Hight to High
    * Remove redundant tool in left toolbar (option toolbar)
      (this option is now in layers manager)
    * Show layers in horizontal combo box in same order as in layer manager.
++all:
    minor code cleaning.

patch for relative paths.

files cleaning