[galaxy-commits] commit/galaxy-central: jgoecks: Trackster: provide option to fetch additional data when not all data initially fetched for a tile. For now, all data is refetched rather than iterative fetching. As part of this functionality: (a) enable data providers to accept a max_vals parameter that is used to fetch a particular number of values; and (b) Trackster caches now ignore items with stale=true.