Use an Executor
mv res/{xml,layout}/settings.xml; start option for using sandbox upload
Actually act on the useSandbox option
Maven build still broken, but less so, with move android-maven-plugin 3.1.1->3.8.2
Use ThreadPool to run upload; re-indent; tweak.
Merge branch 'master' of https://github.com:/IanDarwin/jpstrack.android