* src/pic16/devices.inc,

* src/pic16/devices.inc,
  device/include/pic16/pic16devices.txt: replaced compiled-in list
  of devices with a variant parsed at runtime
* src/pic16/device.c: added support for parsing pic16devices.txt,
  clean up
* src/pic16/device.h: removed (now) unused fields from PIC_device
* src/pic16/main.c: removed #pragma maxram,
  (_pic16_initPaths): removed bogus generation of search paths,
  setup the port proper only after the search paths (for
  pic16devices.txt) are set up,
  (_pic16_finaliseOptions): moved processor dependant code here
  from _pic16_initPaths(), clean up
* src/pic16/ralloc.c (pic16_init_stack),
* src/pic16/ralloc.h,
* src/pic16/pcode.c: clean up
* device/include/Makefile.in,
  support/scripts/sdcc.nsi: also install/package pic16devices.txt
* support/scripts/inc2h-pic16.pl: updated instructions

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@5148 4a8a32a2-be11-0410-ad9d-d568d2c75423