[LPC1549] initial commit
[LPC1549] Fixed GPIO

Clean-up PinNames.h and GPIOrelated functions.
[LPC1549] put PINASSIGN0-15 to PINASSIGN[] on LPC15xx.h

and fixed typo on system_LPC15xx.c
[LPC1549] Added UART support
[LPC1549] Added SPI support
[LPC1549] Fixed us_ticker problem
[LPC1549] Added Arduino Shield Receptacles Names
[LPC1549] Corrected wrong pin name
Removed UICR edit.
[LPC1549] Added AnalogIn support
[LPC1549] Added I2C master support
[LPC1549] Added InterruptIn support
[LPC1549] Added export support
Merge branch 'master' of https://github.com/mbedmicro/mbed_private_nxp
nordic_global.h file now included
Merge remote-tracking branch 'upstream/master'
Updated Sleep

using WFE for nordic sleep
Removed systemoff call from deepleep since it does not retain program
state.
Corrected wrong pin names
Updated copyright headers

commented out unused variable in cmsis_nvic.c
Merge remote-tracking branch 'upstream/master'