Added one more failing test to address bad option priority hierarchy
Fix extruder assignment and tests
Set default support material pattern to pillars
Update t/support.t still assuming default support material pattern was honeycomb
Releasing 1.1.0
Update year to 2014 in about dialog
Remove call to on_presets_changed from Tab Page's on_change.

(set_dirty is called which handles it anyway.)
Make set_dirty ignore changes that don't do anything.
Precompute X and Y offsets before path loop.
Precache gcode_comments flag before path loop.
Move extrusion path gcode generation to C++ for speed.
Save the vector used for aligning object volumes to origin and apply it to additional parts added from the object part panel in order to make them coincide
Bump version number
Bugfix: the Y coordinate of Point config fields was not correctly validated and lead to a crash when entering non-numeric values. Includes regression test. #1906
Bugfix: crash when setting number of extruders. #1876
Fix crash when using multiple skirts with a single, non-zero, extruder. Includes regression test
Fix the 'extruder' behavior in CLI and test that Print::Simple accepts an incomplete DynamicConfig object
Fix for incomplete extrusion on solid surfaces
Re-enable the threads config option. #1882
Failing test for broken command line scaling. #1889