* .version: bumped version to 2.5.6 (pic14 ABI changed)

* src/SDCCmain.c: add -DSDCC_PROCESSOR=<id> for pic14 port
* src/pic/glue.c (emitSymbolToFile,pic14_constructAbsMap,
  pic14emitRegularMap,pic14emitMaps): moved output for absolute symbols to
    pic14_constructAbsMap
  (pic14printPublics): declare absolute global symbols as global
  (pic14createInterruptVect),
* src/pic/ralloc.c (IS_CONFIG_ADDRESS): support second config word,
  (newReg): assume new registers unused, use correct name in
    hashtable (reg->name instead of name), more debugLog output
* src/pic/device.h (PIC_device): added fields for verbose output
* src/pic/device.c: moved device definition to pic14devices.txt,
    added routines for runtime parsing of pic14devices.txt,
    added support for second config word
* src/pic/main.c (_process_pragma): removed #pragma maxram,
  (_pic14_keywords): no longer accept "bit" and "sbit" keywords
  (_pic14_initPaths): add search paths with "pic" suffix (not "pic14")
  (_pic14_parseOptions): moved pCodeInitRegisters here
  (_pic14_do_link): add "pic$(ARCH).lib" to linker arguments
* src/pic/pcode.c (AnalyzeBanking): bail out on unset processor,
  (pCodeInitRegisters): rewrapped comments, perpared new approach to
    handling the pseudo stack
* device/lib/Makefile.in: ignore failures in objects-pic16,
* device/lib/pic/{configure,configure.in,Makefile}: added libdev/
* device/lib/pic/NEWS: document new dependency on picXXX.lib
* device/lib/pic/Makefile.subdir,
* device/lib/pic16/Makefile.subdir: improved clean rules
* device/lib/pic/libdev/: NEW, pic14 device libraries
* device/lib/pic/libsdcc/_gptr{get,put}{1,2,3,4}.S: use _X not X
* device/lib/pic/libsdcc/macros.inc: use _X not X, declare default SFRs
* device/include/Makefile.in: create subdir and install pic14 headers
* device/include/pic/p16f_common.inc: removed unused declarations
* device/include/pic/pic16*.h: added header files for 100+ 14 bit
    PICs from inc2h.pl v1.6,
    replaced BIT_AT macros with struct declarations
* device/include/pic/pic14devices.txt: definition of supported devices,
    all above improvements contributed by Zik Saleeba, thanks
* support/scripts/inc2h.pl: removed BIT_AT, replaced with structs
* support/scripts/sdcc.nsi: also install pic14 device libraries and
    headers

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@4086 4a8a32a2-be11-0410-ad9d-d568d2c75423