SAMV7:  Update floating point and TCM configuration options.  Update TODO list.  Update comments.  Refresh a configuration

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

Add a bare bones framework that will do nothing more than support configuration for the Atmel SAMV71 Xplained Ultra board.  Very much a work in progress.