added image tag for uploaded image in purchase show
added configuration for foundation according to docs, removed turbolinks from app, foundation javascript error still present.
removed local copy of foundation and used foundation-rails gem, foundation javascript no longer giving undefined error in console
added ids to application layout divs
layout changes, designing div placement so that they are appropriate for mobile design
put the "add a member by email" in the members modal for group.
made change to purchase model so that it validates presence of one item before a purchase can be made
reran rails g foundation:install, removed foundation files that were overriding the custom content. changed nav bar color to warm orange.
 added orange and magenta colors, deleted foundation files, changed layouts
moved nav bar out into partial, added users controller and route to show users profile page and purchases.
added authorize user before groups controller actions to make sure that the user is actually a part of the group, otherwise the user would be able to view others groups through url manipulation
changed controller authorize user, so that user on first sign in can create groups, without necessarily belonging to one
added method to user model that finds the total cost spent this month for the current user in his/her profile page.