Allow "all" on map (unusable currently), updates #39

- Removes CARICOOS restriction as their registration was fixed a while ago
- Very much needs #31 to be friendlier
Redo updates on front page to include harvests
Recently Updated table now reactive to user selection, updates #39
Update service count logic on index page, updates #39
Datasets on index page updating via d3 as well, updates #39

Unifies updates to single method!
Allow (NONE) asset type to filter datasets
Add Chosen for region multiselect, updates #39
Comma separated region filter on dataset/service view, updates #39
Clicking on front page map adjusts RA filters, updates #39