Separate include and extends tokens
Separate include and extends tokens

Also supports nested filters.

`include path`                     → include, path
`include:filter path`              → include, filter, path
`include:filter(opts):filter path` → include, filter, attrs, filter, path

jadejs/jade-lexer,pugjs/pug-lexer,pugjs/pug-lexer,pugjs/jade-lexer