Issue #1842924 by gielfeldt - Delete cache_graceful variables when uninstalling
Removed deprecated file.
Disable graceful caching of displays.
Ensure inclusion of panels file.
Pass around display instead of renderer.
Added panels plugin.
Issue #1803174 by gielfeldt - Fetching data from cache without taking cache table into account
Issue #1685516 by gielfeldt: Pager not working
Issue #1610784 by c960657: Invalid "access arguments" in hook_menu()
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