Changed base layer IDs.
Updated to correspond with new map service.
Update layers.xml
Update layers.xml
Reconciled pull request.
change #2

mouse wheel to zoom in/out, show pointer when clicking subtitle, move
zoom previous/next button to the top of the window, put checkbox in
front of each subtitle
Merge remote-tracking branch 'upstream/master'

Conflicts:
	layers.xml
Reconciled merge conflicts.

(DVA)
Merge pull request #16 from Georgia-Tech-Center-for-GIS/GretaYi-master

Reconciled merge conflicts.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	layers.xml