Give students some leeway on the color, seems like some OSes don't handle colors perfectly.
Merge pull request #352 from tobyk100/color-fix

Give students some leeway on the color, seems like some OSes don't handl...
Bump version to 0.0.138
Bump version to 0.0.139
Fix file type ending for mime types.
Merge pull request #351 from nanan9177/sharing

Sharing
Bump version to 0.0.140
Only showing the student drawings.