Took out all the user folder stuff and put it into the file dialog.
Also made file dialog remember what folder was last used and use that one if it has been set.
Does the old user folder when not set.
Fixed a bug with some zip files that seem to have an empty entry.
Fixed a couple more selection issues.
Made the arrow render the same way as the other meshes. (same api)
Put upArrow3D into its own file.
Added custom progress bar control.
Improved the z axis movement plane
Made the skirt values have a menu
Merge branch 'development' of https://github.com/MatterHackers/MatterControl into development
Put in a z-height display.
Fixe the e speed for SeeMeCNC in 1.1.4
Drop SharpZipLib and refactor for System.IO.Compression
Remove compiled assemblies from project root
Merge pull request #117 from jlewin/development

Drop SharpZipLib and refactor for System.IO.Compression
Made the pre-heat use the temperature and bed_temperature .
Put in a menu to select the slice settings level.
Merge branch 'development' of https://github.com/MatterHackers/MatterControl into development
Put in a description.
Some working on streamlining the ui and creating a new 'simple' mode.
Putting a menu to switch view settings.
Made the trace data build faster.
Made ungroup understand mesh collections better
Made the slice settings layer index be an enum so it is clearer what is being accessed
Put menu items into separate files
Cleaning up some interfaces
Made the default size bigger.
Fixed a problem on starting first time (new to this build)
Moved some bools to enums to make the code more readable.