Migrate Bash logic to Golang binary.

[awalsh128]

Many issues that have been filed are due to the implicit behavior of the Bash environment which can sometimes even be influenced by the caller environment (e.g. #98). As the complexity of the solutions have grown, I have found a need for more sophisticated data structures and syntax.

There has already been some migration (e.g. #119) to provide more robust command handling and testability (i.e. replay command output in tests).

[rindeal]

golang means binary blobs, I'd recommend python