same stuff from mbed trunk (LPC17xx.h, etc.) but nothing else

Dependents:   registers-example test test Tweeting_Machine_HelloWorld_WIZwiki-W750

same as the mbed trunk dated december 20th, 2012

(latest version is here: http://mbed.org/projects/libraries/svn/mbed/trunk/LPC1768/ARM)

no such method: tip