restore side by side maps

[ericnost]

The comparemapper.html allows loading different data layers for the same location and visualizing them side by side.

It is currently broken in different places for a few reasons:

• the "side by side" json in config.js that defines layers for mapping in comparemapper.js includes broken services. Just need to update where these links point to, to the same services currently in the main TOC.
• the code in comparemapper.js makes a query of a lookup table that is no longer available. This lookup table just needs to be rebuilt based on the dataobj definitions in config.js
• the "demographics" option relies on a custom table/layer of ACS data, with summary values at various Census units for different measures like population density. The custom table/layer is no longer available.
• similarly, the "threshold" option relies on a custom table of "exceedances". Some of this information might be available in the main EJScreen tables?

[ericnost]

the "side by side" json in config.js that defines layers for mapping in comparemapper.js includes broken services. Just need to update where these links point to, to the same services currently in the main TOC.

This is mostly done. But I missed a few e.g.

criticalservices: {
		description: "Crtitical Service Gaps",
		mouseover:"Crtitical Service Gaps",
		type: "agsdynamic",
		visible: false,
		dynamic: true,
		layerurl: localRESTurl ,
		service: "ejscreen/critical_service",
		transparency: "1",
		removable: false,
		defaultlayer: [-1],
		listlayer: [0, 1, 2, 3, 4],
		position: 5,
		imageName: "chapel_16x16.png",
	},

should be updated to match the suggestservicesCRITSVCGAPS json. This may or may not work going from a map server to a series of feature servers...at the very least could just spell out each service individually rather than in listlayer