Initial swipe up gesture added to hero
Test
Adding swipe down function. Ground/Hero contact working.
Merge branch 'vincentBranch' of https://github.com/tnahvu/SkaterBrad into GestureBranch

Conflicts:
	SkaterBrad/GameScene.swift
Add swipe down, hero ground contact
resolved master conflicts
Merging background work and contact work
First Initial Pull Request
Merge pull request #5 from tnahvu/gestureBranch

Gesture branch
Updated and reorganized code
Merge pull request #6 from kpham13/GameScore

Updated and reorganized code
animation
Merge branch 'master' into ActionAnimations
action animation
Merge pull request #7 from TinasFu/ActionAnimations

Action animations
-Added crane, added trashcans. They scroll w/ ground, appear ever 2 seconds.
Merge branch 'master' into KoriBranch
-Fixed merge
-separated spawn obstacles into 3 separate functions so that they can spawn more randomly
- changed the speed of bench to the speed of the road