The source project of this merge request has been removed.
Fixed point write
The Paraview .vtk file parser cannot handle scientific notation, i.e., it'll choke on SCALAR data values like 1e-5.
This commit forces the writer to use fixed point notation.
At the risk of letting the PR become unfocused, I also removed all the buffer flushes. This increased the writer performance by a factor of 20 on my machine.