Created Board FEZ Cerb40 II (markdown)

Board-FEZ-Cerb40-II.md

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+Cortex M4
+* GHI Electronics FEZ Cerb40 II https://www.ghielectronics.com/catalog/product/450
+
+###Features###
+* STM32F405RGT6 ARM 32 bit CORTEX M4™ 168MHz
+* 1024KB FLASH, 192kB SRAM
+* 12 MHz crystal
+* 32.768 kHz RTC Crystal
+* MiniUSB connector
+* on-board 3.3V regulator
+
+This is basically about as bare bones as you can get for an STM32F405 board.
+
+###Status###
+Supported using BOARD=CERB40
+
+To flash, connect the LOADER pin to 3.3V while resetting (or plugging in the USB). This will put the board into DFU mode.
+
+Remaining instructions are as per pyboard.