added debug/programming header

hardware/footprints.pretty/debug.kicad_mod

@@ -0,0 +1,12 @@
+(module debug (layer F.Cu) (tedit 56A3BF19)
+  (fp_text reference DBG** (at 1.75 -1.5) (layer F.SilkS)
+    (effects (font (size 1 1) (thickness 0.15)))
+  )
+  (fp_text value debug (at 1.75 1.25) (layer F.Fab)
+    (effects (font (size 1 1) (thickness 0.15)))
+  )
+  (pad 1 thru_hole circle (at 0 0) (size 1 1) (drill 0.7) (layers *.Cu *.Mask F.SilkS))
+  (pad 2 thru_hole circle (at 2.5 0) (size 1 1) (drill 0.7) (layers *.Cu *.Mask F.SilkS))
+  (pad 3 thru_hole circle (at 5 0) (size 1 1) (drill 0.7) (layers *.Cu *.Mask F.SilkS))
+  (pad 4 thru_hole circle (at 7.5 0) (size 1 1) (drill 0.7) (layers *.Cu *.Mask F.SilkS))
+)

hardware/library/debug.dcm

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+EESchema-DOCLIB  Version 2.0
+#
+#End Doc Library

hardware/library/debug.lib

@@ -0,0 +1,19 @@
+EESchema-LIBRARY Version 2.3
+#encoding utf-8
+#
+# debug-header
+#
+DEF debug-header DBG 0 40 Y Y 1 F N
+F0 "DBG" -350 -250 60 H V C CNN
+F1 "debug-header" 450 -250 60 H V C CNN
+F2 "" 0 0 60 H V C CNN
+F3 "" 0 0 60 H V C CNN
+DRAW
+X C2D 1 -200 -150 200 D 50 50 1 1 I
+X C2CK 2 -100 -150 200 D 50 50 1 1 I
+X RX 3 0 -150 200 D 50 50 1 1 I
+X TX 4 100 -150 200 D 50 50 1 1 I
+ENDDRAW
+ENDDEF
+#
+#End Library