Clean up samples

[tobiaskunz]

I cleaned up the planningTab. I reduced the code size by more than half. This also needs to be done with all the other examples. The clean-up includes addressing issue #5.

If you need ideas for the clean-up, check out my changes in commit https://github.com/golems/grip-samples/commit/123560a5b27f3e8021c1e2c74923dd1a8a337069