Added exec function to allow a developer to run a DOS executable and have the build fail if the DOS program fails.
Added exec function to allow a developer to run a DOS executable and have the build fail if the DOS program fails.

Added logic to set the $ErrorActionPreference to Stop so that we can capture any errors from a PS command-let and have the build fail

Added validation logic to task function to throw error when the name is not set

psake/psake