Preliminary support for LPC13XX

Works only with GCC_ARM for now.
[LPC1347]: first implementation of PWMOut (not tested)
[LPC1347]: first implementation of analogIn (not tested)
[LPC1347] Added GPIO interrupts
[LPC1347]: first implementation of USB device (not tested)
[LPC1347] Added support for the ARM toolchain.
[LPC1347] Change LED pin names
[LPC1347]: add support for RTOS
Added support for UART break generation.
[LPC11U24] Take advantage of the full 8K of RAM

The linker command scripts/startup files used only 4K of RAM on this target.
mbed_interface_disconnect/powerdown are now synchronous calls

Fixes PRMBED-804
Update README.md
synch targets, exporters and tests
Added ytsuboi's modifications for using the 1114
Changed to use newer fork of mbed sdk

Using ytsuboi's updates to the sdk, but with a brand new fork of the sdk
from mbedmicro/mbed
Lots of changes, fixing build bugs and renaming

Files renamed to fit with the new style folder structure
Got rid of note in README.md that isn't needed
Added UART to testing.
Added output.txt to .gitignore

It is a really pointless file, I may as well delete it.
Revert "Added output.txt to .gitignore"

This reverts commit 6bfb704dc7f4b8be43a2890b977b594a7d638e31.