Updated LabTech script

Updated ScriptID variable to be set to ‘0’, which prevents the script
from overwriting existing LabTech scripts (unless the Script GUID
matches).  Also updated the script to include checks for the
Umbrella_RC service before installing.

Updated ReadMe file
Adding advanced script

New advanced LabTech script uses global variables rather than prompts
to allow automated deployments with very little intervention required.

See ReadMe for more details and instructions.