Another try to check for the current branch during installation

setup.py

@@ -22,10 +22,13 @@ def get_version():
     try:
         git_describe = subprocess.check_output(["git", "describe", "--tags"])
         git_describe = git_describe.decode("utf-8").strip()
+        git_branch = subprocess.check_output(["git", "branch", "--show-current"])
+        git_branch = git_branch.decode("utf-8").strip()
 
         f = open('version.txt', 'w')
-        f.write(git_describe)
+        f.writelines([git_describe, "\n", git_branch])
         f.close()
+
         # and do it one more for packaging if possible
         # f = open('src/rwth-nb/version.txt','w')
         # f.write(git_describe)
@@ -33,6 +36,7 @@ def get_version():
     except:
         f = open('version.txt', 'r')
         git_describe = f.readline()
+        git_branch = f.readline()
         f.close()
 
     # check whether
@@ -41,7 +45,6 @@ def get_version():
     version = git_describe
     split_describe = git_describe.split('-')
 
-    git_branch = subprocess.check_output(["git", "branch", "--show-current"])
     if (len(split_describe) > 1 and git_branch == "master"):
         raise Exception("I do not want to build this package since you did not tag your current state of work.")