add readme text

README.md

+pbsutils
+========
+
+This is a collection of utility scripts for using the PBS queueing system on
+a computer cluster. These scripts have currently some configuration switches
+that re specific to some of the clusters we use at DTU Wind Energy. If you
+are using these scripts on another cluster, you will need to proceed with
+caution and you might need to make some changes here and there. First thing
+on the to-do list would be to add all configuration or cluster dependent
+settings into a seperate configuration file.
+