added animation functionality to rover example 1 as proof of concept.  requires JSAnimation library
Tweaked notebook to continue using animation

Left turning not working quite right; will figure out tomorrow
Merge pull request #18 from barbagroup/gforsyth/animaterover

Gforsyth/animaterover
Renamed lesson 2 as lesson 5

We don't know the exact placing of this lesson yet, but I'm renaming it
"five" for the time being
New lesson 2, working draft added

Context for lesson is unit conversion and it builds skills in defining
functions
Small change to lesson title

Calling the module "JITcode" to make the heading shorter so it fits on
one line
update README

… but I'm getting an error with the script; something's wrong
Edits to final section in lesson 1

I hadn't seen that last bit and it needed some editing.
Editing new lesson 2
Typo and little fixes in lesson zero

update license notice to say code is MIT
More progress in lesson 2
Add function composition to lesson 2

plus overall tweaking; still needs some more punch
tweaking lesson 2
Merge remote-tracking branch 'origin/master' into alex_mar_25_update

Resolved conflict by keeping Alex's changes and discarding
changes currently in origin/master

Conflicts:
	lessons/rover_planning_1.py