updated mucker, nextdoor, rdio, and bloomberg logos
bloomberg logo update
added yelp to sponsors, commented out firebase
adding yelp logo

Signed-off-by: Brandon Foo <takkun00@gmail.com>
Merge branch 'master' of https://github.com/LAHacks/lahacks-site

Signed-off-by: Brandon Foo <takkun00@gmail.com>

Conflicts:
	views/index.html