v2.1 Release
Changes:
- e4e3526 Fix #339.
- 6249347 Remove redundant definition.
- 62c09a9 Fix external command runner version used in tests.
- 3f57bd1 Fix useraccountcollector on linux
- a6e42f8 Fix duplicate completion message.
- a31e5b1 Rewrite administrative user detection for linux.
- 2f34b76 Add verbose logging for loops.
- 272d7a0 Fix potential loop scenario from hardlinks.
- 285d8d5 Fix marshalling
- f7eb577 Improve some error outputs.