Container shell option

[m0bua]

Can you please add an option to choose container shell? Many containers has bash support, it's not cool to type "bash" every time.

[Tupiet]

Hey! This issue was solved in #9, so it can be closed without problems. :)

[fboaventura]

@brpaz the code referenced by @Tupiet was merged, but never released. 🙂