Describe the logic used for credential switch
Disable credential switch for dotfile installation

Closes #22
Prepare patchset/v2.0.2
Merge branch 'patchset/v2.0.2'
Fix declaration of a local variable

Closes #23
Prepare patchset/v2.0.3

- issue/23
Merge branch 'patchset/v2.0.3'