Update serial_api.c

add UART_3 at pins PB_10 and PB_11
Update PeripheralNames.h

Add USART3
Merge pull request #270 from cfb95/patch-5

Update serial_api.c
Merge pull request #271 from bcostm/master

[NUCLEO_F030R8] Many improvements added
Merge pull request #272 from bcostm/master

[NUCLEO_F030R8/F302R8] Move back SetSysClock() call in SystemInit()
[NUCLEO_F030R8] add more channels for ADC
Merge branch 'master' of https://github.com/mbedmicro/mbed
Added K64F TCP/IP support

Currently NET_7 (HttpClient test) and NET_8 (NTP test) fail for
unknown reasons.
K64F TCP/IP code compilation temporary workaround
Merge pull request #273 from bcostm/master

[NUCLEO_F103RB] Correction in us_ticker
Updated MBED_A19 24LC256 EEPROM test. Added new test MBED_A25 24LC256 I2C EEPROM pattern write/read to test suite
Small updates for test MBED_A12, MBED_A19, MBED_A25 (SD, EEPROM, EEPROM)
Small refactoring + code indent
Merge pull request #274 from bcostm/master

[NUCLEO_F302R8] Add LSE configuration for RTC
[NUCLEO_F030R8] add more I2C pins
[NUCLEO_F030R8] add more SPI pins
Merge branch 'master' of https://github.com/mbedmicro/mbed
Merge pull request #275 from dbestm/master

[NUCLEO_F030R8] add more pins for I2C, SPI, ADC
[NUCLEO_F401RE] Add LSE configuration for RTC, remove trailing spaces, typo corrections