[Leaving as a WIP for now]
Adds additional JETUncertainties tool to run the PDSmear systematics with a single initialisation of SUSYTools.
In order to run, the path to the FullJER systematic set needs to be set in the SUSYTools config file (this has been left in the default config as a commented out path). Also the PDSmear line needs to be uncommented (and set to true, again this has been left in the config file).
For the analyser, there is likely a change to how the systematics need to be called from ST (should be similar to how it is now done in the SUSYToolsTester file).