create a changelog file

Signed-off-by: Alfredo Deza <alfredo@deza.pe>
add the version to dunder init

Signed-off-by: Alfredo Deza <alfredo@deza.pe>
add --version and trigger help with no args

Signed-off-by: Alfredo Deza <alfredo@deza.pe>
make use of the __version__ in setup.py

Signed-off-by: Alfredo Deza <alfredo@deza.pe>
update the changelog with this branch changes

Signed-off-by: Alfredo Deza <alfredo@deza.pe>
Merge pull request #39 from alfredodeza/5934

CLI updates for --version, --help and exceptions from exc.DeployError