Feature 9 verify package behavior when target is already built
This merge corrects the broken
--package feature of sconsider.
It was broken due to incorrect detection of changed files and post targets attached to them.
Therefore the package mechanism was not able to copy all required files due to missing intermediate targets in case the intermediate targets were already built.
In order to correctly detect intermediate built files, the required minimum scons version needs to be 2.5.0.