GOF: Module, Proxy, Twin

[joaorobson]

Module, Proxy, Twin GOFs and document it on GitHub pages.

Tasks:

• [x] Study Module
• [x] Study Proxy
• [x] Study Twin
• [x] Analyze what we can use in our project

Acceptance Criteria:

• [x] The document on pages explains what is each one of these GOFs
• [x] The document explains which ones we can use in our project and why.