include overview images in PCB and SMT fab packages

- atben/README-PCB, atusb/README-PCB: added overview images for PCB front
  and back
- atben/README-SMT, atusb/README-SMT: added overview image for PCB front
- atben/README-SMT, atusb/README-SMT: clarified that the Gerbers are in
  the PCB archive
- makefiles/Makefile.kicad (PCB_FILES): moved list of gerbers to
  $(GERBERS)
- makefiles/Makefile.kicad (gerber): generate Gerbers only if necessary
- makefiles/Makefile.kicad (overview, uoverview, clean): renamed
  overview.png to $(NAME)-overview.png and turned phony target into file
  target
- makefiles/Makefile.kicad ($(NAME)-front.png, $(NAME)-back.png, clean):
  added generation of front and back images

atben/README-PCB

@@ -6,6 +6,7 @@ Board characteristics:
 - via holes: diameter is nominally 10 mil, but any size <= 15 mil can be used
 - mechanical tolerances: <= +/- 0.1 mm on all sides
 
+
 Layer stacking, from top to bottom:
 
 atben-SilkS_Front.gto	Front silk screen
@@ -14,12 +15,16 @@ atben-Front.gtl		Front copper
 atben-Back.gbl		Back copper
 atben-Mask_Back.gbs	Back solder mask
 
+
 Other design files:
 
+atben-front.png		Illustration of the PCB's front side (without holes)
+atben-back.png		idem, for the back side
 atben-PCB_Edges.gbr	Board edges, for routing (Gerber)
 atben.dxf		idem (AutoCAD DXF)
 atben.drl		Excellon drill file
 
+
 Interpretation of files:
 
 - for all coordinates, the origin is the lower left corner of the board

atben/README-SMT

@@ -9,11 +9,12 @@ Board characteristics:
 
 Design files:
 
+atben-front.png		Illustration of the PCB's front side (with silk screen)
 atben-bom.csv		Bill of materials
 atben-pos.csv		Automatic insertion file
 * footprints
 
-The PCB design files are in a separate archive, atben-pcb-*
+The PCB design files (Gerbers, etc.) are in a separate archive, atben-pcb-*
 
 
 Interpretation of files:

atusb/README-PCB

@@ -6,6 +6,7 @@ Board characteristics:
 - via holes: diameter is nominally 10 mil, but any size <= 15 mil can be used
 - mechanical tolerances: <= +/- 0.1 mm on all sides
 
+
 Layer stacking, from top to bottom:
 
 atusb-SilkS_Front.gto	Front silk screen
@@ -14,12 +15,16 @@ atusb-Front.gtl		Front copper
 atusb-Back.gbl		Back copper
 atusb-Mask_Back.gbs	Back solder mask
 
+
 Other design files:
 
+atusb-front.png		Illustration of the PCB's front side (without holes)
+atusb-back.png		idem, for the back side
 atusb-PCB_Edges.gbr	Board edges, for routing (Gerber)
 atusb.dxf		idem (AutoCAD DXF)
 atusb.drl		Excellon drill file
 
+
 Interpretation of files:
 
 - for all coordinates, the origin is the lower left corner of the board

atusb/README-SMT

@@ -11,11 +11,12 @@ Board characteristics:
 
 Design files:
 
+atusb-front.png		Illustration of the PCB's front side (with silk screen)
 atusb-bom.csv		Bill of materials
 atusb-pos.csv		Automatic insertion file
 * footprints
 
-The PCB design files are in a separate archive, atusb-pcb-*
+The PCB design files (Gerbers, etc.) are in a separate archive, atusb-pcb-*
 
 
 Interpretation of files:

makefiles/Makefile.kicad

@@ -31,7 +31,7 @@ BRD=$(shell pwd)/$(NAME).brd
 
 
 .PHONY:		all gen generate sch brd xpdf front back clean
-.PHONY:		gerber gerbv fab
+.PHONY:		gerber gerbv fab fab-pcb fab-smt
 
 all:
 		@echo "make what ? target: gen sch brd xpdf front back clean"
@@ -77,14 +77,18 @@ back:		$(NAME)-Back.ps
 
 # --- Industrial production ---------------------------------------------------
 
-PCB_FILES = README-PCB $(NAME)-PCB_Edges.dxf $(NAME).drl \
+GERBERS = $(NAME)-SilkS_Front.gto $(NAME)-Mask_Front.gts \
-	    $(NAME)-SilkS_Front.gto $(NAME)-Mask_Front.gts \
 	  $(NAME)-Front.gtl $(NAME)-Back.gbl $(NAME)-Mask_Back.gbs \
 	  $(NAME)-PCB_Edges.gbr
 
-SMT_FILES = README-SMT $(NAME)-bom.csv $(NAME)-pos.csv
+PCB_FILES = README-PCB $(NAME)-front.png $(NAME)-back.png \
+	    $(NAME)-PCB_Edges.dxf $(NAME).drl $(GERBERS)
 
-gerber:
+SMT_FILES = README-SMT $(NAME)-front.png $(NAME)-bom.csv $(NAME)-pos.csv
+
+gerber:		$(GERBERS)
+
+$(GERBERS):	$(NAME).brd Makefile
 		pcbnew --plot=gerber --origin=aux \
 		  -l `pcbnew --list-layers $(BRD) | tr '\012' ,` \
 		  --fill-all-zones --exclude-pcb-edge \
@@ -138,11 +142,18 @@ upload:
 
 # --- Overview images ---------------------------------------------------------
 
-overview:	gerber
+$(NAME)-front.png: gerber
-		$(PRETTYGERBV) $(NAME) all overview.png
+		$(PRETTYGERBV) $(NAME) front $(NAME)-front.png
 
-uoverview:	overview
+$(NAME)-back.png: gerber
-		qippl overview.png wpan/tmp/$(NAME)-$(VERSION)-overview.png
+		$(PRETTYGERBV) $(NAME) back $(NAME)-back.png
+
+$(NAME)-overview.png: gerber
+		$(PRETTYGERBV) $(NAME) all $(NAME)-overview.png
+
+uoverview:	$(NAME)-overview.png
+		qippl $(NAME)-overview.png \
+		  wpan/tmp/$(NAME)-$(VERSION)-overview.png
 
 # --- Cleanup -----------------------------------------------------------------
 
@@ -154,7 +165,7 @@ clean::
 		rm -f $(NAME)-Back.gbl $(NAME)-Mask_Back.gbs
 		rm -f $(NAME)-SilkS_Back.gbo $(NAME)-SoldP_Back.gbp
 		rm -f $(NAME)-Comments.gbr $(NAME)-Drawings.gbr
-		rm -f overview.png
+		rm -f $(NAME)-overview.png $(NAME)-front.png $(NAME)-back.png
 		rm -f $(NAME)Front.pos $(NAME)-pos.csv
 
 spotless::	clean