Merge diff resource branch and invoke diff resource registration scripts

**Changes**
  1. Merge [diff-resources][1] branch into the [daemon][2]. **Review pending** on the [diff-resources][1] changes.
  2. Invoke parent script in the `ParentDaemonThread` - 51293a3 
  3. Invoke child script in the `ChildDaemon` - 82df572
  4. Parent and child script creation - c0d4c3f, 17c978b, fb2cb90, fb7f66c and d0678bb
  5. Add `clean` and `prepare` targets to `build.xml` - 7d30f8e

### Important
Do not merge into the master unless the code review comments have been fixed!

 [1]: https://github.com/mschuma/MicroCloud/tree/diff-resources
 [2]: https://github.com/mschuma/MicroCloud/tree/daemon