Add user settings to default green number and lift on input page

[duraz0rz]

It'll be annoying to input my green and lift numbers every time. I should let the user save these somewhere.

Implement model-view-presenter pattern if appropriate. Might have to re-engineer the current activities to do so.

[duraz0rz]

List of things to do:

• Read up (and maybe implement) Android architecture components.
• Implement MVP
• Refactor existing view code into fragments
• Add navigation drawer (this necessitated converting views to fragments)
• Create settings page and store settings somewhere
• Populate default values on sudden+ page

These are broken down into tasks in the project.