Merge pull request #81 from jlewin/development

Reset active slicer to MatterSlice for multi-extruder printers
Make sure we don't send empty lines to the printer.
Merge branch 'development' of https://github.com/MatterHackers/MatterControl into development
Made output to folder understand amfs
Made all the code that was only handling stl also do amf
Improved auto-name feature to change on model change
Will not change name if user types value into name box
Merge pull request #82 from mmoening/development

Improved auto-name feature to change on model change
Add support for apk downloads.
Merge branch 'development' of https://github.com/MatterHackers/MatterControl into development
Made it so we write the config file contents to the gcode we are outputting.
Merge branch 'development' of https://github.com/MatterHackers/MatterControl into development
Put in new settings from SeeMeCNC
Made create part sheet work with amf.
Implemented a new 2 column view that shows the 3d View and can access the 'advanced controls'
turn off new mode
Switch to async file dialogs