Post-release routine merge
A couple of new ideas
Adding field and methods for real and virtual nodes
It's like having a virtual global head node
New idea
Merge branch 'exp' into ongoing
Here comes a new class
I'll need debug, for sure
Invocation
Loading names from cmdline or file
More options
Loading
Loading and ordering heads
Now using ordered heads for plot
Removing duplicate code
Removing marks and jumps
HeadHunter is going to perform all the invocations
Hunter is now hired for good
Everything's simpler
Another chunk was factored out