[maven-release-plugin] copy for tag zxing-3.4.0

Barcode Scanner 4.7.8

[maven-release-plugin] copy for tag zxing-3.3.3

[maven-release-plugin] copy for tag zxing-3.3.1

Fix proguard library path for android app

[maven-release-plugin] copy for tag zxing-3.3.0

Change log for 3.3.0, BS 4.7.6

Update notes for BS 4.7.5

Add what's new for 4.7.4 and update proguard