NUCLEO_F103RB: Add I2C master api
Added RTS/CTS flow control

Currently implemented only for LPC1768. On this platform, when hardware
flow control is not directly supported, it will be emulated.
Also added "not_implemented.c" as a placeholder for various HAL functions
that might not be implemented on all platforms (in this particular case,
serial_set_flow_control). These are weak implementations that default to a
"not implemented" error message.
Fixed RTS/CTS bit-banging on LPC1768
Added flow control test

Since this requires a separate serial port connection, added this as a
new attribute of the MUTs.
Hardware flow control implementation for LPC81X
Fix defined labels for Cortex-M4F
[LPC4088]: Networking was broking when splitting peripheral RAM into two sections
[LPC4088]: elif should have been else
[NUCLEO_F103RB] Timer fixes

- the timer data structures were not properly initialized
- changed slave timer mode to external clock 1 (section 15.3.15 of the manual)
- avoid a possible race condition when concatenating the values of the
  two 16-bit timers
[NUCLEO_F103RB] Serial interrupt fixes

- use TC flag instead of TXE for TX interrupt
- clear interrupt flags to prevent possible interrupt storm
[NUCLEO_F103RB] Test porting

Ported GPIO and UART tests, verified as working.
Changed name of LPC4088 cmdline hook function

For compatibility with the on-line build system
Merge pull request #120 from arebert/lpc4088

[LPC4088]: Networking was broking when splitting peripheral RAM into two...
Added KL46Z and NUCLEO_F103RB to the official SDK build
adding support for serial port
typo
only use one port with CDMA at the moment.
Merge branch 'master' of https://github.com/mbedmicro/mbed
- add support for MultiPort Serial Devices
- allow to configure the debug level of the USB stack
fixed the comparison