PIC32MZ: Make sure that the microMIPS ISA is selected on all common MIPS32 assembly files when the PIC21MZ is selected

MIPS:  Add some build support for the M14K and also for the PIC32MZ Starter Kit.  Still a long way to go

Add basic board support for the PIC32MZ (can't build yet of course because there is not yet any PIC32MZ support)

Add path for Pinguino tools.  Need to be careful because bin directory has an incompatible make.exe in it

pic32mx-starterkit: Move scripts to common directory.  Pinguino build needs to use a different linker script

pic32mx-starterkit: Move scripts to common directory.  Pinguino build needs to use a different linker script

Rename pic32-starterkit to pic32mx-starterkit to make room in the namespace for the pic32mz-starterkit

NSH: The default priority of the network initialization thread should be lower.  It is CPU intensive and can interfere with other operations

Viewtool STM32F107: Add support for an optional, add-on Freescale MPL115A baramoter.  From Alan Carvalho de Assis

LPC17xx:  Add IPv6 support to the LPC17 Ethernet driver.  Untested... I no longer have a proper environment for LPC17 debug.

SAM4 Ethernet Driver:  No supports operation using the high priority work queue so that packet processing can occur outside of interrupt level processing.

SAM4E-EK: The nsh configuration now configures the Ethernet driver for execution on the HP work thread.

Convert all STM32F4-Discovery configurations (with base board) to configure the Ethernet driver to use the work queue (vs. interrupt level processing).