Increase mutation rate
Triple-click to get nearby Narjillo's DNA
WIP (experiment on weird-moving isolated Narjillo)
Fix vector math

I've been too quick in assuming "edge conditions" are not a problem.
With vector math, they are: all operations that rely on vector angles
are potentially vulnerable to zero-length vectors, and this is actually
a big deal. I used checked exceptions for once - it's important that
every caller is checking the parameters when doing any
operation with vectors that might involve a zero-length vector.
WIP: genetically engineer minimal flickering Narjillo

This is an interim commit to try and spot the damn "flickering" bugs.
I'm trying to isolate a very small Narjillo that shows the flickering
problem, so that I can then debug the issue.
Finally fixed the "flickering" bug

God, am I stupid.
Reintroduce energy management

Easy now that the physics is solid. ;)
Reintroduce floating random seed
Update backlog