* src/pic16/device.h (pic16_options_t): added field use_crt,

* src/pic16/device.h (pic16_options_t): added field use_crt,
crt_name, no_crt,
* src/pic16/genarith.c (pic16_genPlus): added an assert(0) line to
catch a probable future bug,
* src/pic16/gen.c: aopIdx function commented out,
* (genAssign): commented out old code which used aopIdx,
* src/pic16/glue.c (pic16glue): removed some legacy fragments of
code, added if conditionals to take into account the --use-crt
command line options,
* src/pic16/main.c (pic16_optionsTable): added new command line
options, --use-crt= and --no-crt,
* (_pic16_linkEdit): now the proper crt object is added in the
linker command line except than when --no-crt is specified,
* pcode.c,
* pcode.h: added some structures and functions for a new
optimization scheme to compansete for instruction overhead between
same iCodes, this scheme is currently under development and is not
working in any way,
* src/pic16/gen.c (genAnd): added patch provided by Aaron Collwell
to && operator,
* device/lib/pic16/startup/crt0i.c,
* device/lib/pic16/startup/crt0iz.c: added global char variable
__uflags to force the generation of an idata section

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@3491 4a8a32a2-be11-0410-ad9d-d568d2c75423