Fix errors in commons lang3 definition
Version code
#4521: Release preparation
#4521: Release preparation

also aligned version names/codes for both plugins
Make the Android geocoder an observable

Part of #4522.
Use GC geocoder as last choice

Part of #4522.
Add MapQuest geocoder

Part of #4522.
Add tests for geocoders

Part of #4522.
Merge branch 'release' into upstream