LibVersionCheck

V0.04:

• Register Event.Addon.Startup.End with a priority of -99 now - we want our handler to be called after every other addon had a chance to register itself.
• Addons that don't register themselves (which probably means the player removed them from their list) assume a version number of "0" now which means their version isn't checked.

V0.03:

• Implemented some suggestions by Mere to reduce CPU usage
• don't put addons with MyVersion="0" into the reply list anymore - these are addons that we don't use ourselves, but have heard about, no reason to tell anybody about them
• added a developer mode: "/libversioncheck developer on" sets a flag that prevents your LibVersionCheck from responding to queries, so you can try out newer versions of your addons without incorrectly telling people they should update
• added a mode to remember all replies: "/libversioncheck spy on" causes all replies by all other players to be remembered, and put into the global SavedVariables file. This is for devs who want to know which other addons people are using together with theirs, which might be the source of some problems. Don't use this lightly, the saved file gets large quickly.