Implement a "time" range parameter

[agstephens]

Call the parameter time.

Use the value: <datetime>/<datetime>

Propose it would work like:

• split by year
• for year in years:
  • if year == years[0]:
    • start = time[0]
  • else:
    • start = "-01-01T00:00:00"
  • same for end.

If "time" in parameters:

• use "time" else:
• use "year", "month", ...

[agstephens]

Implemented in commit:cf60831c117ba40dee56b7c26378bf44373f22de

Currently raises an exception if more than 1 year is selected.