+ Add selectHasBeenLoaded to track if the data has ever been loaded before
+ Add selectLoadWasAttempted to track if an attempt to load the data has ever been made
^ Bumped version to 0.8.1
* Updated changelog to reflect latest changes
Should we go ahead and add facade properties too? We have isLoading$, loadedAt$, etc - so I think it'd make sense to add hasBeenLoaded$ and loadWasAttempted$
Issue #218