WowAce

John Wellesz:
    - X-Max-Interface: 50400
    - Added LNR_ON_TARGET_PLATE_ON_SCREEN callback and strengthened GUID linkage upon targeting which could miss a few opportunities.
    - MINOR to 3
    - Reduced target identification timer from 0.3 to 0.1.
    - Added a sample test add-on to test all libs APIs and callbacks
    In the "example" sub-folder
    - Fix a leaked global and removed unused upvalues.
    Also fixes a link in the comments
    - small code cleanups and typo fixes in comments
    - Added link to wowace forum thread
    - Added link to example.rar containing the example mod
    - Added link to wowace forum topic