WowAce

Shefki:
    - Add throttling for repeating timers.
    When the client is busy the animation system will still call the
    OnFinished function the same number of times as though it had a delay.
    This is different behavior from AceTimer where if more time has elapsed
    than should have since the last fire only one fire will happen.
    - Add tconcat upvalue I missed putting in when I put safecall in.
    - Add .docmeta file.
    - Initial commit