Update README to describe per-action blocked and required apps (for PC 1.4.4)
Update README to describe per-action blocked and required apps (for PC 1.4.4)

onecrayon/PopClip-Extensions,Kapeli/PopClip-Extensions,Kapeli/PopClip-Extensions,a-b/PopClip-Extensions,Kapeli/PopClip-Extensions,bopo/PopClip-Extensions,Kapeli/PopClip-Extensions,bopo/PopClip-Extensions,onecrayon/PopClip-Extensions,dreki/PopClip-Extensions,chenruixuan/PopClip-Extensions,dreki/PopClip-Extensions,onecrayon/PopClip-Extensions,chenruixuan/PopClip-Extensions,chenruixuan/PopClip-Extensions,a-b/PopClip-Extensions,bopo/PopClip-Extensions,chenruixuan/PopClip-Extensions,dreki/PopClip-Extensions,a-b/PopClip-Extensions,bopo/PopClip-Extensions,chenruixuan/PopClip-Extensions,a-b/PopClip-Extensions,chenruixuan/PopClip-Extensions,bopo/PopClip-Extensions,dreki/PopClip-Extensions,dreki/PopClip-Extensions,Kapeli/PopClip-Extensions,onecrayon/PopClip-Extensions,Kapeli/PopClip-Extensions,a-b/PopClip-Extensions,onecrayon/PopClip-Extensions,bopo/PopClip-Extensions,dreki/PopClip-Extensions,a-b/PopClip-Extensions,onecrayon/PopClip-Extensions