Use consistent sh-bang lines

`bin/development` was hard-coded to use `/usr/bin/ruby`.
All the other bin files use `/usr/bin/env ruby`.
Pass arguments to `tail`

https://devcenter.heroku.com/articles/logging

If you have multiple dynos and/or dyno types
and want to filter log tailing to the process or dyno type,
you pass those filters on with the `--source` or `--ps` arguments.

This commit adds argument passthrough to the `tail` command.

Also:

* Convert single-quotes to double-quotes for affected files.
v0.3.1
Enable redis-cli access to RedisToGo

This commit helps accomplish the functionality described in
https://github.com/croaky/parity/issues/8. Using `Open3` from the standard
library to capture the output of the request to Heroku for the URL, which is
then memoized and parsed with regex to get the host, post, and password.

User can then access their redis service with `production redis_cli`.
Incorporate PR feedback

* Make `REDIS_URL` default environment variable for Redis config
* Change subcommand to `redis-cli` to match command-line tool
* Break up Redis arguments when passed to `Kernel.system`
* Clean up style

Update feedback