issue #4: Allow to specify specific command
issue #7: Expose the Proot args to JuJu cli
issue #3: Validate the image built
Merge pull request #8 from fsquillace/3_validation_image

issue #3: Validate the image built
Merge pull request #9 from fsquillace/proot_cli

Allow to specify specific command and Expose the Proot args to JuJu cli
Improve function for getting the chroot and proot arguments
Make some functions in core private
Add tests for util.sh #12
Add tests for core.sh #13

Included the tests for die as well.
Add test for run juju as fakeroot and for SECCOMP
Improve the mini pearl script for core unit tests
Add test for juju script #11
Merge pull request #19 from fsquillace/tests

Add Tests for the juju modules
Close issue #20
Fix issue #6
Merge pull request #23 from fsquillace/issue_6

Fix issue #6
Fix issue #21
Merge pull request #24 from fsquillace/issue_21

Fix issue #21
Fix issue #25
Fix #25 tests for old bash version