Prevent compilation issues when someone has included <stdint.h> before
a header file that needs to include <ns_list.h>.
Some toolchains like ARM C 5 will not provide UINT_FAST8_MAX in C++
unless __STDC_LIMIT_MACROS is defined, and if this was not defined the
first time <stdint.h> was included, it's too late.
We can get the maximum value for our unsigned list offset by casting -1
to it, thanks to modulo arithmetic.
Nanostack related files moved under 'feature/nanostack'
Common libraries moved to 'features/frameworks'
Allow FEATURE_COMMON_PAL still to be defined in the build so
that we don't break any builds.
Arto Kinnunen
Kevin Bracey
Seppo Takalo