use os.count_cpu() to determine pool size. If only single worker is available...

use os.count_cpu() to determine pool size. If only single worker is available used old-style non-parallel iteration.

.gitignore

@@ -42,6 +42,12 @@ ehthumbs.db
 Thumbs.db
 .idea/
 /venv/
+/venv*/
+
+# ignore HPC related skripts #
+##############################
+run_*_develgpus.bash
+run_*_gpus.bash
 
 # don't check data and plot folder #
 ####################################