Somehow, I managed to corrupt the other pull request, so here is a new one:

This feature (Issue #6) adds a NodeModuleCollector.ts that tries to find all currently loaded npm modules:

1. It synchronously runs npm ls --depth=0 --json to get all installed packages on root level. Those modules are cached, as they won't change during runtime.
2. It checks require.cache to get all currently cached modules. Those are all JavaScript files that have been required since startup of the application.
3. It crops all those paths to get the portion behind /node_modules/, which is the module name, and makes them unique.
4. It returns all installed packages from 1. that match those module names.

Furthermore, it iterates all exception properties and puts them in the @ext data field on the error object, showing them as "Additional Data" in the UI (Issue #8). The following properties are currently ignored:

'arguments',
'column',
'columnNumber',
'description',
'fileName',
'message',
'name',
'number',
'line',
'lineNumber',
'opera#sourceloc',
'sourceURL',
'stack',
'stacktrace'