Code Improvements

Merge pull request #19 from IBM-Swift/code_review

Code review

Remove testing credentials

• Default testing credentials have been moved to a private repo.
• If you would like to run the tests yourself, please enter the necessary login info to your own SMTP server in /Tests/SwiftSMTPTests/Constant.swift.

Consistency changes

Update package.swift and rename some API params for consistency.

1.0.0

We are pleased to release v1.0.0 of Swift-SMTP.

• macOS and Linux support
• Swift 3.1.1