Added sprintf_ function to save 20kb of space
- removed USB libraries for STM32F105/7xx, STM32F2xx and STM32F4xx -
replaced with correct ones for STM32F10x, STM32L1xx and STM32F3xx
- removed USB OTG libraries
- added USB Examples from ST (Original-src/USB Examples)
added ST's USB Library documentation as a reference
removed obsolete VCP examples, fixed paths in sample .cproject file
added smaller version of sprintf_ (thanks acc007), added the USB_FS library (none of the usb libs are currently used), updated the import file in setup/cproject.orig