Contains several functions for injecting html/js/css
此脚本不应直接安装。它是供其他脚本使用的外部库，要使用该库请加入元指令 // @require https://update.cn-greasyfork.org/scripts/40894/266335/%5BLIBRARY%5D%20InjectorLib.js
This is a library.
Use it with @require in your code.
Functions:
inject_srcjs(url)
inject_rawjs(js_code)
inject_headhtml(html_code)
inject_bodyhtml(html_code)
inject_customhtml(html_code, appendafter)
inject_globalcss(css_string)
