Appion

Dear Neil,

Do you mind if I take a stab at this, specifically with a Relion 3D refinement result? Thanks.

To have:
Resolution
Number of particles
Number of iterations
Folder
NGL viewer to look at the volume

I had to fix the "recenter" part of the code - the recentering wasn't actually running when the option was set because the syntax was wrong.
More importantly - the Origin_x & y are in pixels relative to the extracted particles, so they have to be scaled relative to the original micrograph. Also, these values have to be subtracted, not added, from the original particle coordinates. I've implemented the recentering the same way that Sjors does it in his preprocessing.cpp code. Should be recentering properly now.
I also removed the requirement for X11 forwarding for the matplotlib stuff.