updated: dependencies version

updated: paypal link

updated: dependencies

cleanup: remove copyright headers from xml file which were messing with build

updated: launcher icon for sample app

updated: readme with logo

updated: launcher icon for sample app

updated: lib version to 2.0.0-6

updated: readme with latest usage guide

refactor: code cleanup and refactoring

added: lifecycle observing capacity, code cleanup

update: code fix

updated: codebase to use v2 of publish script

added: uses feature tags to lib manifest file

updated: cleanup in build.gradle files