Do not double check for booleans.
Improve type detection code.
Add icons to Scatter plot, Mosaic, Sieve and Model map
Merge branch 'master' of github.com:biolab/orange3
Add directories .idea and Orange.egg-info to .gitignore
Fix scatterplot bug introduced in 17425fd1.
Merge branch 'master' of github.com:biolab/orange3 into schemeworkflow