Important Release 0.4.0

Please update to v0.4.0 as soon as possible.
Fixed a vital bug that caused a large number of temporary files to be generated on Windows OS, reported by #49 .
This bug exists from v0.1.0 to v0.3.4, Windows version only.
If you have used the Windows version before, you may found a large number of *.TMP temporary files at C:\Users\%USERNAME%\AppData\Local\Temp. You can safely delete them.
Thanks Micheal on Stack Overflow for pointing that using a clipboard listener is invasive to users.
To fix above issue, the clipboard listener for updating image instantly was removed.
Now, users may preview image with Space key. Or, directly send OCR requests with Enter key.

重要更新说明 0.4.0

请尽快更新至 v0.4.0。
该应用之前的 Windows 版本会在 C:\Users\%USERNAME%\AppData\Local\Temp 目录下产生大量的 *.TMP 临时文件，这些文件可以被安全的删除。
这个 bug 存在于 v0.1.0 到 v0.3.4 的 Windows 版，问题由 #49 报告。
感谢 Stack Overflow 的 Micheal 指出使用剪贴板监听线程去实时更新预览截图并不是一个合规的方法。剪贴板监听线程已被移除。
现在你可以使用空格键更新预览截图，或者直接使用回车键发送OCR请求。