Tree Class + Delete Tree
Merge branch 'master' of https://github.com/Swarthmore/litterfall

Merged. Tree Class in litterfall.py; delete tree function

Conflicts:
	html/main.js
	html/templates/update2.html
Fix erronous merging earlier
Merge branch 'master' of https://github.com/Swarthmore/litterfall

Fixing the erronous merging earlier