CLC-2565 Use different cache keys for has-history lookups
[CLC-2569] Harden telebears processing
Merge pull request #1595 from yuhunglin/CLC-2569

[CLC-2569] Server error from telebears
Merge pull request #1594 from ctweney/clc-2565

CLC-2565 Use different cache keys for has-history lookups
[CLC-2506] Base proxy for inserting/deleting calendar events
[CLC-2506] Method calling chain refresher
[CLC-2506] Fixes
Merge pull request #1596 from yuhunglin/CLC-2506

[CLC-2506] Base proxy for inserting/deleting calendar events
[CLC-2450] Because Angular date filter expects ms...
Merge pull request #1598 from yuhunglin/CLC-2450

[CLC-2450] Because angular date filter expects ms
CLC-2513 - Front-end: implement polling for new data
https://jira.media.berkeley.edu/jira/browse/CLC-2513