better admin problem and news editor

[dotkrnl]

• trust admin post without deleting html tags
• use TinyMCE for problem and news editing
• 相信管理员输入的信息，不去除 HTML 标签
• 使用 TinyMCE 来编辑问题和新闻（要不实在是太蛋疼了）

[dotkrnl]

BTW, TinyMCE is LGPL 所以直接用是没有问题的 XD

[freefcw]

有关上传文件的功能没？

[dotkrnl]

There's no uploading function in TinyMCE. But there's plugins for that. TinyMCE 没有上传功能。但是有相应插件（我没有加）。

I'm trying to find a plugin for image with base64 encoding. XD 我正在试图找一个用 base64 实现图片功能的插件 XD，不过还没找到。

[dotkrnl]

I've adapted a plugin to insert image (< 100KB && 800x800 max) with base64 encoding. It only supports modern browser.

我改写了一个插件，可以插入小于 100KB，最大 800x800 像素的图片的 base64 编码。 呃当然只支持现代浏览器 XD。

[freefcw]

为什么要用base64编码呢？这样有点太重了吧

[dotkrnl]

The data URI scheme is a URI scheme (Uniform Resource Identifier scheme) that provides a way to include data in-line in web pages as if they were external resources. It is a form of file literal or here document. This technique allows normally separate elements such as images and style sheets to be fetched in a single HTTP request rather than multiple HTTP requests, which can be more efficient. http://en.wikipedia.org/wiki/Data_URI_scheme

And with base64, we can insert small image without uploading it.

根据维基百科的介绍，对于较小的图片，这个方法更为高效。 而且这个方法，可以不用增加上传图片的功能 XD 直接嵌入 HTML

[dotkrnl]

Large images will be truncated which cause problem. 那啥，我们讨论一下要不要增大数据库里字符串允许的长度？ 我突然发现比较大的图片会被截断。

[dotkrnl]

In database of Google Code version, only images smaller than 50 KB can be saved. 我刚刚测试了一下，Google Code 版本的数据库只能放大概 50 KB 的图片一张。

[dotkrnl]

I've removed the plugin from this pull request. 我已经把这个插件暂时从 PR 里去除了。 等我们决定怎么处理再新开一个 PR。 然后所以这个，如果你觉得没问题就可以 merge 了。

[freefcw]

图片还是单独存放的啦，比如uploads文件夹，我先解决一下验证码的问题，讨厌的广告

[dotkrnl]

conflict resolved 冲突已解决