[docs] more user friendlier README
[project][docs] added screenshots for README
Merge branch 'develop' of github.com:artem-zinnatullin/android-wail-app into develop
[project][docs] added screenshots to README
[docs] added info about contributing to the project
[docs] added Question & Answers to the README
[docs] Google Play link now uses params for GAnalytics
Merge branch 'develop'