Split project template and libraries modules

[enginebai]

Goals

• Make this project as simple as possible, to demonstrate how to use Gradle Kotlin DSL project as template.
• Move other codebase (i.e. extension, base, utilities ...etc) as library from this template project, so that we can import and update this library independently.

[enginebai]

It had been done, there are three branches:

• https://github.com/enginebai/AndroidBase/tree/gradle-kotlin-dsl
• https://github.com/enginebai/AndroidBase/tree/template
• https://github.com/enginebai/AndroidBase/tree/library