Add text shadow to highlight dates in text.
来源：https://userscripts.org/scripts/source/76451.user.js
镜像站地址：http://userscripts-mirror.org/scripts/show/76451.html
Script Summary: Highlight dates in text with text shadow. |功能：用字体阴影高亮日期文本。
Version: 1.10b
If you always have to check the dates of / in the information you are reading, Get this!
这是一个有趣的脚本，如果你要快速找到信息或信息中的日期，这脚本适合你。
2010.06.12 Version 1.10b Fix a style conflict in context.
2010.05.26 Version 1.10a Fix some style conflicts in context.
2010.05.18 Version 1.10 Refine for marching more date formats.
2010.05.14 Version 1.00 Refine and now it can match almost all date formats (for English and Chinese) !
2010.05.11 Version 0.91 Constrain its matching range, prevent some false-positive match.
2010.05.10 Version 0.90 Initial release, only match digit-"year-month-date"-like format of text, and may match other non-date text.
