* support/valdiag/tests/overflow.c: added shift tests

* support/valdiag/tests/overflow.c: added shift tests
* src/pic/device.c,
* src/pic/gen.c,
* src/pic/gen.h,
* src/pic/glue.c,
* src/pic/main.c,
* src/pic/pcode.c,
* src/pic/pcode.h,
* src/pic/pcodepeep.c,
* src/pic/pcoderegs.c,
* src/pic/ralloc.c,
* src/pic/ralloc.h: applied patch from Slade Rich;
added support for multiple code pages and multiple RAM banks on the
PIC 14 port. The ASM files now no longer simply assume all the
code / RAM are in the same page / bank. This means the linker can
safely allocate code/RAM of separate ASM files to different pages/banks.
* doc/sdccman.lyx: added Slade's tips

git-svn-id: https://sdcc.svn.sourceforge.net/svnroot/sdcc/trunk/sdcc@3144 4a8a32a2-be11-0410-ad9d-d568d2c75423