Don't raise on missing config file

[chrisarcand]

Features were added that cause eager loading of the configuration file for default command flags. This causes Octopolo to exit in error instead of providing help information and allowing you to set up Github auth for your user when you don't have a config file. That should be allowed.

This changes Octopolo to merely print a nice warning message saying it couldn't find your config file, allowing you access to those other functions. Also bubbles up messages from the Github wrapper which isn't so bad at all:

$ op view-pr
*** WARNING: Could not find .octopolo.yml or .automation.yml ***
An error occurred while getting the current branch: GitHub Repo is required

Fixes #76

r? @anfleene

[anfleene]

This looks great. I'll do a bit of QA and then draft a release for it.

[anfleene]

BAM looks good 👍

$ be bin/op github-auth
*** WARNING: Could not find .octopolo.yml or .automation.yml ***
Would you like to generate an GitHub API token with your credentials or enter one manually?
You *must* enter a token manually if you are using GitHub's Two Factor Authentication.
For more information, see https://help.github.com/articles/creating-an-access-token-for-command-line-use

1) Generate an API token with my credentials
2) I'll enter an access token manually
> error:
$ be bin/op view-pr 10
*** WARNING: Could not find .octopolo.yml or .automation.yml ***
An error occurred while getting the current branch: GitHub Repo is required

[anfleene]

V1.2.1 is out on rubygems 🎉

[panderson74]

Thanks @chrisarcand !

[chrisarcand]

❤️