Add read flash command.
Change to MessagePack binary write.
Remove comment.
CRC moved to a different module
Zero copy on flash write (fixes #18)
Merge pull request #16 from nuft/command-read-flash

Read flash command.
Merge pull request #19 from antoinealb/write-command-zero-copy

Write command zero copy
Add test for flash read
Merge commit '984356b8ea8e52760d53e49e1df11dad66947b0e'

Conflicts:
	command.c
Fix types.
Read correct msgpack type.