Added ion_loader comments
Fixed types of TemporalBounds attributes
Fixed OOI preload for external dataset categories
Revert "Merge pull request #1012 from lukecampbell/qc"

This reverts commit 50e194082256f46c64da2abcb0c7211a7325783c, reversing
changes made to ef7837cd843a6c036ae82382ddf3521b4eb691e7.
 change column name to publish_rate
Merge branch 'master' of github.com:ooici/coi-services into platform_alerts