Cleaning up bugOne mini board

	* Added 3 grounded mounting holes (one is near the antenna, usable to
ground an external antenna)
	* Removed two old capacitors, replaced by one following MCP1700 and
XC6206 datasheets
	* Set R0 as shunt for regulator, if no regulators are soldered on the
board.
        * Added an access to uC controlled alimentation on connector2 (V+)
        * Renamed components
        * Changed track size below the uC

The board can still be optimized, probably by changing the AVR place (moving it
downward). Another shunt should be provided for the MOSFET.