Windows support

Would this work? http://stackoverflow.com/a/5327531/2578205
Does anyone have a Windows machine to test on.

> Just do
>
> ```
> SET
> ```
>
> You can also do SET prefix to see all variables with names starting with prefix.
>
> for example if you want to read only derbydb from the enviorment variables do the following :
>
> ```
> set derby
> ```
>
> and you will get the following :
>
> ```
> DERBY_HOME=c:\Users\amro-a\Desktop\db-derby-10.10.1.1-bin\db-derby-10.10.1.1-bin
> ```

No repository file, test, or entry point is named. Start by reviewing the 33-comment discussion and the linked Stack Overflow example to establish the intended Windows behavior; done requires an agreed implementation scope and verification on a Windows machine.

Written by the indexing model from the issue text.