Requirements

* Provide portable and flexible core libraries to develop an android app using the [LSTS](https://github.com/LSTS) toolchain concepts.
* Use fragments in a way that pieces of code from a screen to another may be implemented without further modifications.
* Adapt screens from a app to another without the need to develop new features.
* Re-use code developed to an app and fix bugs to another by having a common set of libraries.