Fixes #94

Description

Adds the ability to log to stdout when the --debug flag is added to any command. This adds 3 new global methods to log, which are just some simple syntactic sugar around Go's std.log module.

pkg.Info(msg), pkg.Warn(msg) and pkg.Error(msg) are available and will print any messages with a pre-formatted debug log. This is useful for troubleshooting with a client or during development. All the the core packages have logs added and more can written as needed (see issue checklist)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Documentation (non-breaking change with enhancements to documentation)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• I have checked that unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

Further comments