overlay is now updated 5 times a second instead of 2 times a second and on each received/sent message, so it should be faster with many connected peers now.
removed indicator bars for sending/receiving messages, instead the timers change color on received/sent messages
removed S. and R. as smallest strings for sent and received. Sent and Recv are now the smallest. (more space was available since the bars were removed)
added counters for total active/new peers
long peer id's now get ellipsized in overviewconnections
closes #47 and closes #51