remove samples from test package (calculator application and ui tests)
add samples to new sample package (moved from tests package)
add packages to baseline and add samples with core to default packages
add packageExtension
Merge pull request #5 from SWTI2014/refactor/package_for_samples

Refactor/package for samples

travis ci build failed .. i suppose because of the / in the branch name, will test this in master (little squeak debugging revealed: github to url decoder in Metacello does not support this)