automatic extract script and style tags from html token content

[rlsz]

Add ruler: automatic extract script and style tags from html token content.
Script will be excuted, and style will be added to ducument head.
No need to write script code and style code twice.
#2 --this issue could be avoided.

[huangshuwei]

I have already started using it.
it's really a good PR

[QingWei-Li]

Cool. I will test it tonight.

[rlsz]

Hold on.
I just found reg "<(script|style)[^<]*</\1>" confused special chars '<' or "</script>" or "</style>".
If script scope has a string type variable which content those chars, error appears.
Reg is too complex to resolve this. Need more time.

[QingWei-Li]

v2.0.0 is released.