Update version code for contacts plugin

The plugin was changed since initial build.
To make sure we do not test and release an outdated apk I increase the version before building the initial release with CI.
Added play icon for contacts plugin
Do not use AndroidObservable

This lets us return to an unmodified version of RxJava.
fix #3729: compass deviation -90° in landscape mode
Merge branch 'release' into upstream
Remove inlined method
fix #3733: mini-compass deviation in cache list
Merge branch 'release' into upstream
crowdin: New translations
Merge pull request #3734 from rsudev/crowdin_translations

crowdin: New translations
fix #3732: last known position not used for live map
Use directory path instead of files in tests
Update Robotium library

Also, reenable the test. It will be disabled again if it does not work
reliably on the continuous integration server.
fix #3736: wrong image when opening a spoiler with Photos

The Photos application seems to do some image caching. For most images,
we already have an accessible on-disk copy that can be used instead of a
unique temporary name.
fix #3729: compass deviation -90° in landscape mode (GPS)
Implements #3692. Add support for new opencaching nodes

Added opencaching nl,us,ro live support and preferences
Refactoring opencaching implementation
WIP service summary