Preliminary Homepage Edit

-reroute 0.0.0.0:3000/ path to events page
-default include all groups & tags if no user signed in
-remove favorites and create event buttons if no user signed in
-create signin button if no user logged in, but this should become 2
text fields (think facebook login, etc.)
-FIX ASAP users can’t login, but this shouldn’t be too hard to fix
(link the sign in button to a method that authenticates and reloads the
page)