[NUCLEO_F401RE] Add auto clock configuration (HSE/HSI)

Solve also the problem with the SetSysClock function not declared in
sleep.c

Conflicts:
	libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F401RE/i2c_api.c
Update export/uvision4.py so FRDM-KL05Z uses microlib to match the mbed online IDE.
Merge pull request #299 from sg-/master

Update export/uvision4.py, FRDM-KL05Z uses microlib to match the online mbed.
[LPC11U35_501] Added USBDevice support
Merge pull request #300 from toyowata/master

[LPC11U35_501] USBDevice support
[LPC11U68] Fixed PLL lock issue etc

Fixed PLL lock issue
Corrected system clock related code
Merge pull request #301 from toyowata/master

[LPC11U68] Fixed PLL lock issue etc
[NUCLEO_F401RE] Add PA_7 in AnalogIn pinout
uvision exporter - precompiled headers, flags addition

	- all current templates updated with misc flags option
	- K64F - precompiled headers flag for uvision