Fixed problems with Radial Line of Sight - Single Position/TowerLOS.py:
- no output for Radial Line of Sight - Single Position
- Hardcoded tower height of 2
- Repair incorrectly indexed arguments between script tool and script
- remove arcpy.mapping dependencies
Merge pull request #157 from mfunk/master

Fixed problems with Radial Line of Sight - Single Position/TowerLOS.py:
Merge pull request #155 from jscott11/master

Fixes #91 Added output parameter to Sample Data Dates to Recent Dates tool