Adjustment to Concealment query

Made an adjustment to the Concealment suitability query to include
buildings
Adjusted Highest Points Near Location Tool

Made adjustments to the tool that so that I no longer receive Errors
999999, 010213, 010325, 010067. Additionally, I added to the tool to get
a manageable output. Before I added to the model, I would get a return
of multiple points with the same attribution due to elevation
similarities. Basically, I add a Mean Center tool to remove multiple
point and create a singular center point. Also added function to add
elevation values within the attribute table.
Cleaned up Highest Point Near Locations

Cleaned up the model by removing straggler
Adjustments to the Lowest Points Near Location Tool

Made adjustments to the tool that so that I no longer receive Errors
000875, 000581. Additionally, I added to the tool to get a manageable
output. Before I added to the model, I would get a return of multiple
points with the same attribution due to elevation similarities.
Basically, I add a Mean Center tool to remove multiple point and create
a singular center point. Also added function to add elevation values
within the attribute table.
Merge pull request #133 from erikreid/master

Adjustment to Concealment query