Add maven support (#25)
Add maven support (#25)

To achieve debugging a maven project after 'mvn compile,' one needs to tweak the launch.json configuration with the following:

```
"startupClass": "${relativeFile}",
"options": [
  "-classpath",
  "${workspaceRoot}/target/classes"
]
```
DonJayamanne/javaVSCode,dueckminor/javaVSCode