Added an Easing Plugin

Added an easing plugin that allows us change how the scrolling works .
changef hills wrapper
Merge branch 'natasha' into experiments
sliding in princess' room
formatting
added audio and animations

so I added the audio up until the cantaloupe falling. I couldn't figure
out how to get them to play right after one another so I had to put a
timer on everything. I woud like to figure out a better way to do this.
images no longer fall behind hills
fixed the arrow
changed princess room size
made the princess room slide
scene 1, prinscess scream
falling items

fixed so the falling items don't fall out of the div
button disappear
falling items
button appear
added a timer on the buttons so they appear after some audio
CSS changes on the falling items
falling items
falling items
added the pulse effect to the link

I used a keyframe animation to make the link pulse infinitely .

the code looks epically long because of silly vendor prefixes