Fix the wrong extrusion amount for infill when using a odd wall thickness.
Fix the "object turns black" bug.
Slightly adjust the default 3 profiles.
Update the defualt profile qualities to better reflect what the machine can do.
Fix dual-extrusion with different model heights.
added start script in /usr/bin
Properly clean up the temp files from slicing.
Some cleanup, move the animation code to openglGUI, move scaled quad code to opengl.
Merge pull request #402 from oni303/master

added start script for debian
Add notification popup.
typo
Add reset scale and rotation. Add placeholders for lay-flat and scale-up.
Add object duplication.
Do not show duplicate menu when no object is selected.
Hide tools when no object is selected.
Add working scale up to machine size.
Add lay-flat code.
Do not show the merge menu when no object is selected.
Make the popup menu code more general, add a delete option to the menu. Fix the popup menu showing when turning the camera.
Add layer changing with keyboard when viewing GCode.