turn off antialiasing for brush size 1. increase zoom level. create test
fixed test
Merge branch 'master' into 8.93_px_antialising
Merge branch 'master' into 8.93_px_antialising
Merge pull request #101 from Catrobat/8.93_px_antialising

8.93 px antialising
implementation: [SG] @galstc05
acceptance: [MS] @schmidiM