Fixes dropdown menu in application layout.
Adds before action requiring membership for tasks and memberships.
Removes before action requiring memberships from projects controller.
Shows membership new and edit forms to owners only.
Adds home link to marketing pages and link to my projects for signed in users.
Provides delete membership option for members who are not owners.
Changes to delete membership option.
Prevents members who aren't users from editing projects.
Fixes bug on membership index page.
Makes delete button for memberships available for owners only when it's not last owner.
Fixes navbar on application layout.
Fixes bootstrap on project show page and membership index page.
Fixes capybara test for adding memberships and url for new membership.
Removes unnecessary before_action from marketing pages.
Adds db seeds and controller tests for memberships.
Limits what memberships project members and owners can delete.
Adds link to users in dropdown menu on navbar.
Adds AccessDenied error class.