Add formats, multiple outputs and fixes installation

• Mulitple format support [table, csv, json]
• Multiple output support [stdout, file]
• Fixes installation issues due to missing /v2 suffix
• Add verbose logging flag

Major rewrite - Go.mod support

Adds support for getting dependencies for a project using Go Modules. Support for projects using GoPath has been removed, use v1.0.0 for that.

API has been externalised and can be used outside of glice.