Try to remove shutdown hooks after stopping processes

bump version

Merge pull request #50 from DreierF/fix_test

Fix ExecForkPluginTest

Bumping version to 0.1.15 for publication

Bumping version to 0.1.14 for publication

Add killDescendants property, bump version

Bump to version 0.1.12 for publication

Bump to version 0.1.11 for publication

Fix for issue #16, bump version for publication

Fix compiler error, fix broken tests, bump version