TrimHandler: handle error opening logfile.

I'm not really sure what is causing this to error for some people.
Maybe removing the double '//' will solve the problem?
Update gitignore.
Aegisub-Motion: fix a \fad handling case.
Aegisub-Motion: try to interpolate position from \move.

If there is no \pos override in the line, check for \move.

This was a horrible idea and someone should have convinced me not to do
it.
Version bump.