Added Pause option, fixed bug with accumulating event triggers

Pause option added. So you can easily toggle whether pings are going out
  without having to fully kill pinger.

Fixed a bug where toggling the autostart option would cumulatively add
  new event handlers, eventually making the program unresponsive after
  several toggles.
Fix autostart toggle bug, consolidated some functions

Fixed toggling autostart which was broken last commit.

Consolidated some functions which were only called from one place and
  honestly work more elegantly when merged together.
Made latency labels static size to prevent shifting

Latencies displayed in the widget can be of different precisions, causing
  the widget to redraw when the precision changes. It's a little annoying.
  This makes latency precision static at 2 decimal places.
Fix for mismatched Paused/Resume toggle labels

They were set backwards. Fixed.
Merge pull request #6 from altf4/master

Pull altf4's improvements in