Patches build a uMon image for "raw" mode boot and adds README/

Jarielle Catbagan jcatbagan93 at
Wed Jul 8 21:28:40 UTC 2015

These two patches provide the following:

	* Builds a uMon image for "raw" mode boot
	* Adds a README that documents the process of booting from SD or via UART
	* Adds a script that automates the process of setting up a bootable SD card

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