Add support for a union file system that can be used to overlay and merge the content of two mounted file systems.

Add basic board build configurat for the SAML21 Xplained.  Initial commit is jsut the SAMD20 Xplained with name changes and does not yet build

Adds board support for the Teensy LC board.  Support is based off the Freedom KL25Z board. LED, PWM, and UART0 have been tested. The SPI pins are mapped correctly but have not yet been tested.  From Michael Hope as SourceForge patch 51.

Remove all traces of the Galileo board.  That port is not going to happen -- I dont' even have the Galileo board anymore.

SAMV71-XULT: Add support for on-board LEDs.  Includes partial support for on-board buttons.  Some corrections fo to egg-stk37000 and sam4e-ek discovered during leveraging.  Add board READEM.txt file

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

BAS: Rename examples/bas to examples/bastest.  Hook into build and configuration system.  Finish ROMFS logic

Remove the 16z board support from the main source tree.  It is still avaialable in the misc/Obsoleted directory