A list of requests of things to do:

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A list of todos that are done:

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[Sergey]. numbers on the graphs are the counts, it would be nice if the user
can choose to have them as the fractions of the total number of
snapshots - it would make it easier to compare two graphs with different
numbers of snapshots.

[Sergey]. number next to each node tells you how many times this node
has been "somewhere on the stack" - in order to find out how many
times it has been the one being executed one has to take this number
and subtract the numbers corresponding to all the child nodes. it
would be very helpful if these subtracted numbers were calculated and
shown on the graphs next to each node.  (Nathaniel: Color code these).

[Sergey]. Zoom in/out w/out need mouse wheel.

[George]. Simplify build/use in a MINOS SRT env.