added Luv.Timer.after
added Luv.Timer.every
added Luv.Timer.clear. Fixes #19
added illiterate version
made window.Luv a bit more visible
beginning of tweening
dude, changed the code before the tests. How cowboy of me
basic tweening finally working
working with updateFunction
updated tween so that it has an options param
easing functions can now be specified as strings or functions
added easing functions to Luv.Timer.Tween
renamed after_event and every_event to after and every. Finished integrating tween with timer
added context to tween. Fixes #32
merged with master. removed cascading error-provoking tests