Add keyword argument 'memaddr_use_16b' to i2c.mem_read and mem_write methods
to allow these methods to transmit 16 bit addresses to an i2c device
Add 'memaddr_use_16b' to qstrdefsport.h
Incorporate stylistic changes suggested by @dhylands
Merge https://github.com/micropython/micropython
Initial commit of Myriad2 board-specific configuration files
Merge https://github.com/micropython/micropython
stmhal: Change calls to pfenv_printf to pfenv_vprintf.

Fixes printing bugs introduced by
cb66f41ebc4980f4e6b7543bece19e3b9daac25c.
stmhal: Fix REPL printing by cooking output sent to stdout_obj.

Recent changes to builtin print meant that print was printing to the
mp_sys_stdout_obj, which was sending data raw to the USB CDC device.
The data should be cooked so that \n turns into \r\n.
Merge https://github.com/micropython/micropython
Merge https://github.com/blmorris/micropython into Myriad2
tests: Add testcase for read by length past EOF.

Currently broken for unicode input streams.
Allow DFU_UTIL to be overridden from the environment.
Deal with reading a buffer less than what was allocated.

With this fix, file_long_read now passes.
Change boolean 'use_16bit_addr' to int 'addr_size', can be either 8 or 16 bits, default value is 8
to maintain compatibility with existing code.
remove Myriad2 board config files from master
Merge pull request #767 from dhylands/fix-short-read

Deal with reading a buffer less than what was allocated.
Merge pull request #746 from blmorris/master

Enable 16-bit memory addresses for i2c.mem_read and i2c_mem_write
Merge pull request #766 from dhylands/allow-dfu-override

Allow DFU_UTIL to be overridden from the environment.
stream: Revert to checking for the correct error value.
streams: Treat non-error output size as unsigned.
Add GNUmakefile to the .gitignore file.