Leginon

r15417 fix this. Data array is in meters for consistency but show drift rate in graph in Angstrom for convention.

Test:
1. Use a session you are currently running. Finde drift rate measured by Drift Monitor, note the number.
2. Go to myamiweb summary of the session (click on the top left part of an image viewer where it says summary).
3. Click on the graph for drift and see if the last point of the data corresponds to the measuement logged in Leginon.

Any Leginon MSI user can test.

looks good. I would suggest comments in the code for the magic numbers 1.63e-10 * 4 and 1e-10 to explain what they are and why they are being used.

on second thought, may as well make it to display in pixel if the query for pixelsize fail, save explanation of what that value from tecnai2 is. r15473

Looks good, ready for test.

works for my session