Refactoring search to support more than just db dashboards

pkg/api/api.go

@@ -102,6 +102,7 @@ func Register(r *macaron.Macaron) {
 			r.Post("/db", reqEditorRole, bind(m.SaveDashboardCommand{}), PostDashboard)
 			r.Get("/file/:file", GetDashboardFromJsonFile)
 			r.Get("/home", GetHomeDashboard)
+			r.Get("/tags", GetDashboardTags)
 		})
 
 		// Search