TriremeSpec fails on Windows (Trireme issue)

Running TriremeSpec on Windows yields an Exception:
```
[error]    'Error: Cannot find module 'C:\...\js-engine\./C:\...\js-engine\target\scala2.10\test-classes\com\typesafe\jse\test-node.js'
(/Users/Apigee/src/noderunner/target/checkout/node10/node10src/src/main/javascript/io/apigee/trireme/node10/node/module.js#340)
```

It looks like Trireme actually does not support Windows very well (cf: https://github.com/apigee/trireme/blob/master/node10/node10src/src/main/javascript/io/apigee/trireme/node10/main/trireme.js#L774).

A possible workaround is to pass the script content to Trireme instead of the script File.

This issue is also referenced on Play's tracker (in the comments): 
https://github.com/playframework/playframework/issues/2803