Add a general bit-bang SPI lower-half driver and implement the bit-bang driver for the Arduino ITEAD TFT shield

Add an NSH configuration for the Arduino Due; Pluse several fixes related to the Due and to the SAM3X in general

Flesh out the Arduino Due board configuratino and integrate it with the build and configuration system

Add peripheral configuration logic for the SAM3X/3A; Change all references to SAM3/4 SPI to SPI0 for compatibity with the SAM3X/3A which has SPI0 and SPI1; Add directory which will eventually holdl an Arduino Due port

Add support for a separate CCM memory allocator for members of the STM32 family that support CCM memory

Fix UG-2832HSWEG04 landscape.  Add reverse landscape support to UG_2864AMBAG01 and UG-9964HSWAG01.  Fixe NXHELLO default colors for 1-bit mono modes

Add support for the UG-2843HHSWEG04 OLED and for the SAM4L Xplained Pro OLED module that uses that OLED.

Straighten out issues about who calls C++ initializers with CXXTEST or HELLOXX are built as NSH applications; Add an ofstream test to CXXTEST suggested by Michael; Update many defconfig fiels to that they set configurations to handle C++ constructors just as before these configuration changes

Add support for a generic windows-based EABI toolchain; Add NX configuration to force default NXTK border colors

Remove CONFIG_XYZ_BUILTIN configurations, replace with the single CONFIG_NSH_BUILTIN_APPS.  Add SAM3/4 sam_periphclks.h which is just a header file that includes the right header file.  Misc SAM3U-EK cleanup