Version bumped to 1.4.3

Merge pull request nordicsemi#61 from NordicSemiconductor/develop

Version 1.4.2

Readme updated

Merge pull request nordicsemi#46 from NordicSemiconductor/migration/a…

…ndroidX

Migration to Android X (Jetpack)

Android Studio 3.3.1

Typos

Version 1.2.0

Support for AE explained in Readme.

Adding annotations to androidJavadoc gradle task

README.md created