at beginning of move set feedrate to average of last and current feedrate.  do move with that feedrate.
then set the feedrate to the current feedrate.
if it's just a feedrate change, then the feedrate will become the feedrate.
if there is no feedrate in current move, feedrate will be last feedrate
if there is a move and a new feedrate then the move will take however long the average feedrate would take.

estimation is a bit more optimistic than pessimistic.  however it seems to be a lot more accurate.

Added an Estimated Time Remaining of Total Time to the status bar.

for non-SD Printing. They get more and more accurate until the end.

Catch exception so that disconnection does not give a traceback

Small change to enable T0 and T1 commands.

French translations update

Experimental

Bugfix: gviz exception while printing

Remove alphabetic sort order of baud rate combobox

Remove ability to click on Z +/- 100. Fixes #86