Log Message:
Update to 2.2.7

New in Version 2.2
* Ajax based ineractive graph zooming.
Click on any graph in detail mode and use the mouse to mark your area of
interest in navigator graph.
* Multi Target Graphs
Show information from multiple targts in a graph.
* Master/Slave setup for multi source smokeping deployments.
With one central Smokeping Master node, you can run a series of Slave nodes,
taking their configuration from the master. This allows you to ping a single
target from multiple locations.
* Standard Deviation
The standard deviation is now used in several places to give a number for
the variation in round trip times as depicted by the smoke.

See http://oss.oetiker.ch/smokeping/pub/CHANGES for all the details.

OK'ed bouyer@