refactor PaintroidApplication variable names
added File variable instead of fileName and filePath
Merge branch 'master' into refactor_variables
remove comments
try fixing branch
Merge remote-tracking branch 'origin/master' into refactor_variables
Merge pull request #143 from Catrobat/refactor_variables

refactor PaintroidApplication variable names
Merge branch 'master' into P11.01_straight_line