Move developer options into own source file and expand part description -p \*

-p \*/c  check address bits in SPI commands
  -p \*/d  description of core part features
  -p \*/o  opcodes for SPI programming parts and memories
  -p \*/s  show avrdude.conf entries of parts
  -p \*/ss show full avrdude.conf entry as tab separated table
  -p \*/w  wd_... constants for ISP parts
  -p \*/\* all of the above except -p \*/s
  -p \*    same as -p\*/\*

src/CMakeLists.txt

@@ -133,6 +133,9 @@ add_library(libavrdude
     confwin.c
     crc16.c
     crc16.h
+    developer_opts.c
+    developer_opts.h
+    developer_opts_private.h
     dfu.c
     dfu.h
     fileio.c