Add interface definition for platform-specific storage of configuration data; Modify NxWM unit test to use these interfaces, if available, to save and restore touchscreen calibration data.

Telnetd:  Missing argument in debug statement can cause crash in certain error conditions.  From David Sidrane

apps/Makefile should include external/Make.defs so that external applications can participate in the menu configuration

Mov apps/examples/composite to apps/system/composite; convert configs/stm3210e-eval/composite to use kconfig-frontend tools -- untested

Fix warnings in USB MSC when compiled for a high speed device; also fix USB MSC default VID/PID configuration

Suppress attempts to manage USB trace if the USB MSC example is built as an NSH built-in application.  In that case, USB MSC does not do a good job managing trace data and gets in the way of other things that can do a better job (like NSH or the USB monitor).

DHCPD: Fix calculation of lease address.  Bad logic causes repeated assignment of the same IP address.  SourceForge bug #21 from Paolo Messina.