Make API level parameter and get rid of flavours so build take less time
and require less disk space, and builder can configure it at the API
level needed
Add Dockerfile to produce AAR
Attempt to use the generated doker images for gitlab.com CI
When apps that uses libretroshare are compied and proguard is run, Java
classes coming from libretroshare and that are used only by
libretroshare C++ code were errouneously stripped by proguard.
Bundle proper proguard rules in the AAR to avoid runtime errors such
as
java.lang.ClassNotFoundException: Didn't find class "org.retroshare.service.AssetHelper" on path: DexPathList[[zip file "/data/app/com.example.retroshare_aar
getline is not available on lesser API, build anyway but terminate at
runtime printing proper debug message if the function is used.
A better solution might be implemented in the future.
Improved CMake support
Initial work on packaging libretroshare as an Android library AAR
Deal properly with Android API level which miss largefile support
instead of relying on build system trickery
