Error: Unable to access jarfile ~/.conscript/sbt-launch.jar

The file is present at the specified location, but anny attempt to run cs results in this error...

```
$ ./cs
Error: Unable to access jarfile ~/.conscript/sbt-launch.jar
```

This is in cygwin on Win7

what could be the problem here? I am attempting to install giter8.

在 Windows 7 的 Cygwin 中重现 `./cs` 命令，并检查对 `~/.conscript/sbt-launch.jar` 的访问，该文件在 issue 中被报告为存在。当 `cs` 成功启动并且可以继续安装 giter8 时，调查即告完成。

由索引模型根据 Issue 内容生成。