Add ability to find ssh key files and current username as part of SSH module

[Jesse Almanrode]

Not sure how this would work but perhaps a function to do:

1. Discover current username
2. Discover ssh keys in ~/.ssh/

Return this information so it can be used when creating an SSH connection.

[Jesse Almanrode]

Added envvars method which attempts to gather username and ssh_key info from OS.

Resolves Issue #2 - https://bitbucket.org/isaiah1112/sshreader/issues/2/add-ability-to-find-ssh-key-files-and

→ <<cset 69115829d3d1>>

[Jesse Almanrode]

Removing version: v3.0 (automated comment)