public static boolean setDkproHome(String experimentName)
Set the DKPRO_HOME environment variable to some folder in "target". This is mainly used to
ensure that demo experiments run even if people have not set DKPRO_HOME before.
If DKPRO_HOME is already set, nothing is done (in order not to override already working
It is highly recommended not to use that anywhere else than in the demo experiments, as
DKPRO_HOME is usually also used to store other data required for (real) experiments.
experimentName - name of the experiment (will be used as folder name, no slashes/backslashes,
better avoid spaces)
True if DKPRO_HOME was correctly set and false if nothing was done.