added crc check for download
updated for papilot testing
added minor changes plus luftboot address fix
Merge branch 'origin/crc_update'

Conflicts:
	.cproject
	.project
	.settings/org.eclipse.cdt.codan.core.prefs
	examples/blinky/blinky.c
	src/Makefile
	src/luftboot.c
minor change in blinky, added u8tou32 converter to luftboot.