Release 1.9.4

What's Changed

• Fix upload progress indicator label by @rgov in #1301
• Canvas renderer for large images by @BryonLewis in #1319
• update caniuse by @BryonLewis in #1322
• Update girder versions by @BryonLewis in #1333
• SubSample Image Loading by @BryonLewis in #1344
• allowing attributes to be any structure by @BryonLewis in #1347
• Additive import by @BryonLewis in #1309
• Head Tail Bbox Updating by @BryonLewis in #1345
• Sample Upload Script by @BryonLewis in #1343
• NOAA Upload Script by @BryonLewis in #1358
• Terminate subprocess when canceling by @BryonLewis in #1361
• Polling Based Job Cancellation by @BryonLewis in #1365
• Switch to Canvas Renderer by @BryonLewis in #1366
• modifying cancellation by @BryonLewis in #1368
• multicam input pipelines by @BryonLewis in #1346
• release 1.9.4 by @BryonLewis in #1369

Full Changelog: 1.9.3...1.9.4