Merge pull request #350 from KeithV/master

Added processors MX150-D, 250-B, 695-L/H to avrdude.conf
Merge pull request #351 from KeithV/master

Added variants for WF32 and DP32 and updated SD chipSelect for share SPI2 INT1
Updated SD Examples based on recommendations by Keith Vogel
Merge pull request #352 from JacobChrist/master

Updated SD Examples
Normalize line endings
Moved HardwareSerial::flush to 1.0.0 method.  Added hardware TX fifo
Revert "Moved HardwareSerial::flush to 1.0.0 method.  Added hardware TX fifo"

This reverts commit f56e18ce69afc1f4598831b948e7a9a50ea1da83.
Moved HardwareSerial::flush() to purge()
Implemented 1.0.x HardwareSerial.flush()
Enabled full use of TX fifo in Hardware Serial
Added DSPI::setTransferSize(bits) to enable 8, 16 or 32 bit hardware SPI transfers.