Add shebang to launcher (fixes #59)

cedalion/scripts/launcher.py

@@ -303,6 +303,7 @@ def prompt(species_file):
             workDir = workDirEntered
 
         scriptLines = []
+        scriptLines.append("#!/bin/bash")
         scriptLines.append("module load nextflow")
         scriptLines.append("export NXF_WORK={}".format(workDir))
         scriptLines.append("nextflow run {} --name {} --input {} --output {}".format(main_nf_path, runName, inputDir, outputDir))