Adding basic pinging mechanism to server; now we track if we're primary or secondary
Notifying client if we're primary or secondary, and dealing with it (LEFT TO TEST WHAT HAPPENS WHEN WE'RE SECONDARY!)
Cleaning up Messages, getting them ordered and one by line (Joca, check out the fixmes!)
Merge branch 'master' of https://github.com/Jorl17/projecto-sd

Conflicts:
	Common.java