Support META file

[ewpatton]

Some of our datasets have a META file with creation and modification information for a project. If present, we should read the META file and expose its information as attributes on the project.

[anirudhRowjee]

Hi! will a PR be welcome for this issue?

[ewpatton]

Sure. The META file just contains some JSON, e.g.,:

{"name": "HelloPurr", "modified": 1425816210734, "created": 1425816110312}

where name is the project name and created and modified are UNIX timestamps.

[anirudhRowjee]

Thank you! I'll get to work on this.

[anirudhRowjee]

Sorry to ping once again, but I just wanted to communicate my thanks. I owe a lot of my current career path in computer science to App Inventor, which contributed to a large amount of my learning 😄