Adds poor-man's dotenv (.env)
Adds `fail.` function for `progress` printing

Similar to `rspec` or `cucumber`'s "progress" formatters.  Prints a
green `.` for each success (0) and a red `F` for each failure (non-0).
Adds `repeat-status` function

Repeats its arguments infinitely, printing a summary of successes and
failures after each run.
Adds `-g` flag to cuke to prepend git commit hash

Example:

```
log/4bb574a3e5dfed7fb5f1f81b83109ce8356b4b34.cucumber.2013.12.27.230340.log
```
Adds _precommand completion for repeat-status
Allows repeat-status to be non-infinite

```
repeat-status 20 cmd args
```

will exit after `cmd args` returns the same status 20 times in a row.
Unsets vestigial $auto_proxy setup
Preloads _git-branch for push-upstream completion