Updated README
FS: directory operations will now work on empty directory nodes in the pseudo-filesystem
rmdir now may be used to remove empty nodes from the pseudo-filesystem
mkdir can now be used to create empty directories in the pseudo-filesystem.
Cosmetic updates to comments
Bug fix for the MIO283QT-9A driver from Toby Duckwork
Nodes in the pseudo-filesystem can now be renamed or moved within the pseduo-filesystem
SAMD20: Move some common SERCOM logic to a separate file where it can be shared
SAMD20:  Add a framework for an SPI driver
LM3/4: Several errors were unmasked with UARTs > UART2 were enabled. Fromo Gosha
SAMD: A little more SPI logic
Spark configuration updated from David Sidrane
Typo fix from last commits.  From Alan Carvalho de Assis
SAMD20: SPI driver is code-complete, but untested
SAMD20: Changes for clean build of SPI driver and SAMD20 Xplained Pro board with the I/O1 module installed
SAMD20:  Some progress debugging SPI.  Currently hangs
Olimex LPC1766STK: FTPC configure changed to use the kconfig-fronteds tools by Alan Carvalho de Assis
Need to build fs_rename.c even if mountpoints are disabled
unlink/rm can now be used on nodes in the pseudo-filesystem.  There is new configuration option to suppress these costly and mostly useless operations on the pseudo-filesystem
Add CONFIG_DEFAULT_SMALL that will select default values for configuration settings based upon either more features or smaller footprint.  Turns out not be be useful for modifying existing defconfig files because the defaults do not apply in that case