"Last pulled" tracking

[stuartpb]

The "setLastUsed" function should be patched to also set a timestamp.

[stuartpb]

Actually how should timestamps get recorded? Should they be patched into the listings (opening the potential for race conditions)? Should they be tracked as separate items in storage (meaning that getting the necessary data for listings would involve a second round of item gets)? :/

[stuartpb]

Honestly, "last used" is a less important data point in the current designs than I originally thought it was going to be, so I should really just close this, after removing the associated code for it.