Add Bash Testing Framework (Bats) Support

[jhoffner]

https://github.com/sstephenson/bats

[xcthulhu]

I saw this the other day, couldn't figure out how to load an external script in it...

[xcthulhu]

Nevermind, didn't Gandalf the source code hard enough...

https://github.com/sstephenson/bats/blob/master/test/fixtures/bats/load.bats

[saladuit]

Is it possible to add another testing framework for bash to code wars? I was looking at this comparison and it seems that shellspec is the most up to date unit testing framework for bash. Let me know what you think! I also heard about bats, but according to the comparison graph on the page shellspec has way more functionality.