NSH Configuration:  Refactor networking and netutils dependencies
Add support for the XPT2046 touchscreen controller on the Viewtool LCD module
Vietool STM32F103: LCD updates (still does not work)
NSH: Code expects CONFIG_NSH_DRIPADDR and CONFIG_NSH_NETMASK even if DHCPC is necessary.  For now, just removed the dependency on DHCPC in the Kconfig file, but more thought is needed.
Add stpcpy()
Flesh out stddefs.h
Forgot to add stpcpy.c in last commit
Fix types in conditional compilation
NSH: Separate command line parsing from command execution
NSH: Separate command line parsing from command execution.  Add support for multiple, semicolone separated commands on each line
A10: Serial clock is OSC24M.  From Alan Carvalho de Assis
NSH parser:  Separate logic that executes a command into a separate function
Add support for backquoated commands as command arguments
Back quoted NSH arguments now functional
NSH can not handle command arguments that are concatenations of constant strings, command output, application program output, and environment varaible values.
Fix a memory leak in dynamic loader
Enable new NSH features by default in the sim/nsh configuration
Fix a memory leak in last NSH change:  Forgot to close a temporary file
Add support for the STM32VL-Discovery board.  Contributed by Alan Carvalho de Assis
Recent NSH changes broke the minimal NSH configuration