Others: fix very minor issues.

- Comment fix

Pl_Editor: fix copyright in files. Enhancement when creating new items.

REMOVE: vias from specctra DSN export which are not in a netclass.  Use only netclass based via sizes in freerouter.
Some of the vias in the class-less list were setting the drill hole size to zero and this made no sense to freerouter.

ENHANCE: specctra export Edge.Cuts "endpoint mismatch error message" was not showing exact coordinates with sufficient resolution

REMOVE: USE_PCBNEW_NANOMETERS by making it the only way to go in pcbnew, effectively removing the deci-mils build.

formatting and fix selection clarification bug in pcbnew, could not move reference text when hidden under another footprint

Pcbnew: footprint wizard dialogs: minor fixes, and fixes a not working parmeters dialog under Windows, due to an incorrect Printf format.

Save grid origin in .kicad_pcb files only if not 0,0 (to keep compatibility with previous versions of pcbnew, mainly the stable version)
Very minor other fixes (set modify flag when grid origin is moved from the dialog grid)

*) add hotkey for setting the grid origin as 'S', in board editor, module editor.
*) re-position the function interface for cursor movement from BASE_SCREEN into
   class EDA_DRAW_FRAME.  This is a prelude to getting rid of BASE_SCREEN or
   splitting it up.

Minor code cleaning. Pcbnew: better iniatilization of members in DRAWSEGMENT, TRACK, EDGE_MOD (useful when using  python scripting).

Eeschema: fix a *very subtle* bug noticeable only in complex hierachies, for multiple parts per package:
sometimes, the modified flag was set for these components just when switching from a sheet to an other sheet.
Pcbnew: fix Bug #1197414 (dragged track segments does not show clearance area)

This keeps it out of the KiCad mode path, making that leaner and less confusing about
what is supported in KiCad mode.  Within KiCad mode, treat quoted vs. non-quoted tokens
as the two general categories, with non-quoted having sub-categories.  Eliminate  
an unimplemented, unused function declaration in DSNLEXER.
 
Improve the output formatting of THROW_PARSE_ERROR().

in *.kicad_pcb file loading times.

Replace in EDA_TEXT::Draw the parameter EDA_DRAW_PANEL* aPanel  by EDA_RECT* aClipBox, which is the actual parameter used by Draw.
This change make more easy to  use this function when a EDA_DRAW_PANEL canvas is not used to draw texts.
Remove dead code in worksheet.cpp.

Add script to make a footprint library table from the KiCad Bazaar library repository, either in s-expr or CSV format.  Add also the generation of such tables as of today.

This is limited to round tripping the lines of commented text in the
loading and saving to disk through PCBIO::Format() and PCBIO::Parse().
No editing of the comments is given.

The bug was revealed on re-opening the saved version of a file imported by pcad2kicadpcb.

Pcbnew: netlist dialog: add silent mode option, and tool tip to the 2 options (dry run and silent mode)
dialog_display_info_HTML_base: derived now from dialog_shim.

Bitmap2component: add export for .kicad_mod new footprint file format, and export polygon descr for page layout description (.kicad_wks file)

* Do not search for footprint when no footprint is defined for a component
  in the netlist.

Rename invoke_a_dialog.h.  Code an alternate implementation for std::string BOARD_ITEM::FormatInternalUnits( int aValue ), for verification.