Expand the top violators lists and graphs in #5 to include SDWA, TRI, GHG

[shansen5]

Top violators for CAA, CWA and RCRA are identified and graphed.
Add graphs for SDWA, TRI, GHG.
The lists of top violators can be used to pre-populate the selection of facilities later in #11.
SDWA, TRI, GHG do not use the same identifiers of violations that CAA, CWA, RCRA do. The ECHO_modules utilities.py will need to be augmented to report the top violators for these new programs.
Possible fields to use:
SDWA - SDWA_COMPLIANCE_STATUS (Serious violator, Violation identified, Unknown, No Violation Identified - can be mapped into the same results as CAA, etc.)
TRI - TRI_RELEASES_TRANSFERS (Total pounds per year released)
GHG - GHG_CO2_RELEASES (Total facility emissions in metric tons CO2e from the most recent reporting year)

[ericnost]

I really like this idea. The trickiest thing is that TRI releases may all be in pounds (I think), but a small amount of lead may be more important to know about than a heavy amount of a less toxic chemical. Not much we can do about that at this point, except another metric would simply be: Total number of substances reported.