A more python-style list.sort. And keyword arguments.

Conflicts:
	py/obj.h
	py/objbool.c
	py/objboundmeth.c
	py/objcell.c
	py/objclass.c
	py/objclosure.c
	py/objcomplex.c
	py/objdict.c
	py/objexcept.c
	py/objfun.c
	py/objgenerator.c
	py/objinstance.c
	py/objmodule.c
	py/objrange.c
	py/objset.c
	py/objslice.c

It's not really about that, though; it's about me figuring out a sane
way forward for keyword-argument functions (and function
metadata). But it's useful as is, and shouldn't break any existing
code, so here you have it; I'm going to park it in my mind for a bit
while sorting out the rest of the dict branch.

Conflicts:
	py/objcomplex.c

inkscape master file has dxf and coloured svg layers.
Choose a layer for suitable work.

Initial support for Teensy 3.1

* Fix LED pin enum, first one should start at 1
* Fix LED initialization typo

Implements list.reverse; fixes issue #66.

List insert. Fixes issue #61.

Fix off-by-one in non-default values of index's 2nd and 3rd arguments.

Convert many object types structs to use C99 tagged initializer syntax.

Add Initial Support for STM32F4DISCOVERY Board

Make qstr_init reinitialize last_pool.

This causes the pool to get reinitialized properly on a soft-reset.