Added Preferences dialog
Simple mode
Add defaults into Tooltips from #885
Fix for Replicator 1 not finishing builds.

If the progress reaches 100% before last layer, the firmware erroneously stops reading the file.
Remove $Slic3r::flow and $Slic3r::first_layer_flow
Don't validate the number of layers for infill combination, just limit it automatically. #993
Fix regression introduced in 91bcfc8a74425b1bfe3577460e5c3f48bcf17b9e
Bugfix: perimeter/infill overlap was calculated regardless of the infill extrusion width. #994
Bugfix: failure in launching on Windows with non-ASCII characters in username. #1011
Fixed regression in support material after recent flow refactoring. #1012
Bugfix: when using low layer heights and support material, the contact regions were generated with a negative height. #1013
Keep the full geometries in $layer->slices, including thin walls
Slight changes to the defaults
Use bridge math for the first solid infill layer above sparse infill. #240
Remove useless lines
Fix brim and extra perimeters after recent changes to ->slices
Adjust extra perimeters
Bugfix: manifoldness error triggered with multi-volume AMF files. #1019
Bugfix: minimum flow for low layer heights was still too low
Better logic for extra perimeters