Fixing #328
Replacement for gluUnproject, which seems to be causing problems with some intel based drivers. #321
Slight change to the object info corners so there are always 2 corners visible.
Add visual nodes for the scale tool.
Add working scale tool.
Fix typos in README.
Merge pull request #330 from GreatFruitOmsk/master

Fix typos in README.
Merge pull request #329 from smorloc/master

Save/restore window size + Cura update check menu item
Merge remote-tracking branch 'upstream/master' into new-layout