Remove solution of excercise not done in the US

- Target file exercise can't be done because tutorial is 30 min
  shorter.
Excercise result when running with Kepler M6

- Using Kepler M6 as target platform.
- Using current integration build version of Eclipse e4 Tools
  (org.eclipse.e4.core.tools.feature.feature.group 0.12.0.v20130318-2150)
- Also: Added a few more descriptions.