Made lpc11xx port compile again.
Fixed determination of irq number.
Add first and simple systick implementation.
Changed the way irq deals with unhandled irqs.
Add basic clock definition to lpc11xx
Added a simple readline to test things.
Tryied to free toolchain of the gcc dependency, but failed miserably :(
Doxyfile now creates a docset file and ignores CMSIS
Some small work on documentation.
Some work here and there.