👏👏 IJKMediaPlayerKit k0.11.0

• support ass subtitle effects, and adjust position and scale in real time
• support display multiple pgs bitmap subtitle at the same moment, and adjust position and scale in real time
• dropped old subtitle renderer (text->image(Core Graphics)->CVPixelBuffer->Texture)
• subtitle preference move to player from view
• dropped iOS OpenGL renderer
• support http gzip and deflate use headers
• restore ijk dns cache and http event hook
• enable microdvd subtitle decoder
• meta add chapter info,#12