Edited Issue: Setting TypeScriptOutDir to full path breaks TS builds [1611]

We try to append the typescriptoutdir as a relative directory and fail.

```
Create TypeScript Project
Properties->TypeScript Build
Set an out folder that is a full path, i.e. C:\Foo
```

```
Error 1 Unable to copy file "D:\Projects\TypeScriptApp\TypeScriptApp\tsout\app.js" to "obj\Debug\D:\Projects\TypeScriptApp\TypeScriptApp\tsout\app.js". The given path's format is not supported. C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v12.0\Node.js Tools\Microsoft.NodejsTools.targets 69 6 TypeScriptApp
```