Image based rank detection

[andburn]

My latest attempt to fix rank mode (#1653, #1762). The rank detection method I tried before, turns out to be fairly inconsistent. So, I came up with another one. This time its direct image recognition of the rank "medals", from my testing its 100%. Obviously it'll need further testing with a beta release, but I'm pretty confident about it (assuming blizzard don't do anything stupid). It does require another library Aforge, but its not big.

Adds a new class Utility.RankDetection, and you call RankDetection.Match(Bitmap b) with a screen capture param and returns:

RankResult
{
  int Player
  int Opponent
  bool Success
}

I didn't want to start dismantling all the existing rank detection stuff (wouldn't know where to start tbh :) ). So, I added the detection into GameEventHandler.TurnStart and seems to work.

[azeier]

Amazing! Seems to work very well from what I can tell!

Merged into rank_detection branch for now.

Some changes I made:

• Utility.RankDetection.Range needs to be a class or implement the base ctor to compile as C#5 (I added the latter)
• Added Overlay.IsRankCovered() to make sure you only see the overlay flickering if actually necessary.
• Added a DetectRanks() (extracted from TurnStart) call to Game end to deal with instant condeces (that just happened to happen to me while testing :))
• Made DetectRanks() async void with a "running" check to not block the main thread with await RankDetection.Match().
• Added friendslist detection to DetectRanks(), which waits for the FL to be closed and displays a message in the overlay before running Match() (this needs to not block the main thread even more).
• Added a max number of tries to ranked detection if is disrups the user experience (i.e. overlay flickering). We might want to add a general max tries to avoid the overlay flickering x times once a deck list gets too large.
• Completely (I think?) removed the old methods of rank(ed) detection.

[andburn]

Nice additions 👍
It'll be interesting to see how it works when people test it out