Cleanup routes for dashboard

Clean up and re-arrange routing for dashboard. If user signed in, treat root as dashboard#index; otherwise root is static#welcome. Additionally, remove namespacing. Dashboard referred to as simply root_path for logged_in users.

Modify application layout to not show dashboard/alert links for non-logged in users.
Merge pull request #26 from allynfolksjr/fix_routes

Cleanup routes for dashboard