changed root back to welcome#index, since i do intend on having a homepage
renamed graph variables, as well as added new data sets for current rate and adjusted par
logging in redirects the user to their "home page" now. also added a before_filter for authenticate_user. i don't know if this is the right way of doing things
logging in now redirects you to your "home page"
added a TODO item
heavy graph modifications. added new data series' to the Combo Chart
added login info at the top, as well as a placeholder link for the home button
added a create user link