Setup Onion Service for Crash Reports and Feedback

Looks like the onion service we had running is down now:

08-02 20:04:51.596 W/DevReporterImpl: Could not connect to developers
                                      Host unreachable
                                          at net.sourceforge.jsocks.socks.Socks5Message.read(Socks5Message.java:162)
                                          at net.sourceforge.jsocks.socks.Socks5Message.<init>(Socks5Message.java:123)
                                          at net.sourceforge.jsocks.socks.Socks5Message.<init>(Socks5Message.java:108)
                                          at net.sourceforge.jsocks.socks.Socks5Proxy.formMessage(Socks5Proxy.java:253)
                                          at net.sourceforge.jsocks.socks.Proxy.exchange(Proxy.java:458)
                                          at net.sourceforge.jsocks.socks.Proxy.connect(Proxy.java:343)
                                          at net.sourceforge.jsocks.socks.SocksSocket.<init>(SocksSocket.java:109)
                                          at org.briarproject.reporting.DevReporterImpl.connectToDevelopers(DevReporterImpl.java:50)
                                          at org.briarproject.reporting.DevReporterImpl.sendReports(DevReporterImpl.java:84)
                                          at org.briarproject.plugins.tor.TorPlugin$1.run(TorPlugin.java:371)
                                          at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
                                          at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
                                          at java.lang.Thread.run(Thread.java:856)

I know that some of my testers already used the crash reporter. I had to tell them that I am not sure that these reports are already read by someone.