[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
[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
Corrected wrong pin names
add arduino I2C naming to PinNames.h
workspace_tools: Add execution right to build scripts
workspace_tools/build.py: Check if given MCU and Toolchains are supported by the build system
libraries/USBSerial: Allow to create an instance without the USB cable being plugged in

Prior to this change the connection was waiting for a USB cable to be plugged in.
Merge pull request #178 from sg-/FRDM-fix

add arduino I2C naming to PinNames.h
Merge pull request #179 from oliviermartin/om/build-added-error-msg

Added error message to build.py