Created Board STM32F401 Discovery (markdown)

Board-STM32F401-Discovery.md

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+Cortex M4 STM32F401VC
+* on STM site - http://www.st.com/web/catalog/tools/FM116/SC959/SS1532/LN1199/PF259098
+* [Datasheet](http://www.st.com/st-web-ui/static/active/en/resource/technical/document/data_brief/DM00094495.pdf)
+
+###Features###
+* STM32F401VCT6 168MHz (100pin)
+* 256KB flashROM, 64KB RAM
+* 3axis gyro L3GD20, 3axis accelerometerLSM303DLHC, 3axis compassMP45DT02
+* mems microphopne, audio amp CS43L22
+* 8 LEDs
+* USB OTG
+
+###Status###
+No work has yet been done on porting to this chip