output status message when calling service.
beautified UI a lot
cleaned up node.js library includes
downloadAssistant now calls opkg

- opkg update works
- opkg upgrade could not be tested
- modified config.js quite a lot
- added spawnChild method in util.js which reduces code multiplication
- added stubs for parsing the output.
downloadAssistant and initiateUpdateAssistant implemented
Merge pull request #5 from Garfonso/master

downloadAssistant should work now