Async Fault Tolerance

[ahuynh1289]

What type of Pull Request is this? (check all applicable)

• [x] Refactor
• [x] Feature
• [ ] Bug Fix
• [ ] Optimization
• [ ] Documentation Update

Describe your changes in brief

Added cloud-down fault tolerance so that file changes are preserved while cloud connection is down, and will be updated in the cloud once connection comes back. Still need to add a mechanism that evicts files from the cache if the file was updated while the cloud was down and cache timeout has been exceeded.

Checklist

• [x] Tested locally
• [ ] Added new dependencies
• [ ] Updated documentation
• [x] Added tests

Related Issues

• Related Issue #
• Closes #