add repeat limit shield
add cache for Shield
fix problem with non-word danmaku
use static instance instead of set/get
replace QImage with QPixmap when render danmaku
add guest blocking support for acfun
support for acfun
fix font problems
add danmaku saving
fix danmaku loading for bilibili
fix problems when dc on load
add danmakuEditor
Merge pull request #29 from AncientLysine/unstable

Unstable Merge