add 2018 NAIP section to main NAIP page
add 2018 NAIP section to main NAIP page

this is just for the CCMs
agrc/agrc.github.io,agrc/gis.utah.gov,agrc/gis.utah.gov,agrc/agrc.github.io,agrc/gis.utah.gov,agrc/agrc.github.io,agrc/gis.utah.gov,agrc/agrc.github.io,agrc/gis.utah.gov,agrc/agrc.github.io