Catalog listing and enhanced versions of various BOOM items from ben-wpan/bom.

- boom/dist/dk/dk-catq.pl: new - query the Digi-Key catalog for a list of
  items
- boom/dist/dk/dk-db.pl: enhanced - never generate more than 1000 queries
  per wget run (to keep argv from getting too long)
- boom/dist/dk/panasonic-erj.catq, boom/dist/dk/stackpole-rmcf.catq: query
  scripts for dk-catq.pl
- boom/lib/e12.inc: enhanced - added Rxx and Rxxx codes
- boom/manu/panasonic/panasonic.gen: enhanced - added decoding for all ERJ
  series resistors listed at Digi-Key
- boom/manu/stackpole/: (new) part number decoder for RMCF series resistors

boom/dist/dk/stackpole-rmcf.catq

@@ -0,0 +1,14 @@
+#
+# File structure:
+#
+# - manufacturer name as used in BOOM
+# - keyword
+# - product category
+# - zero or more field=value pairs
+#
+# Comment lines and empty lines are ignored.
+#
+STACKPOLE
+rmcf
+Chip Resistor - Surface Mount
+Packaging = Cut Tape (CT)