Merge branch 'master' into ab-debian

Merge branch 'master' into ab-debian

* master:
  make sure /etc/profile does not change the working directory; fixes #1715
  test browser localStorage before using it
  added codacy to README
  set minimum priority for fifo and rr
  proper defaults for process scheduling policies rr and batch
  allow users to set process scheduling priority and nice level; fixes #1712
  do not calculate tc leafs and parents if enabled_all_classes_qdiscs is enabled
  fixed typo
  fixed mem.committed duplicate key
  minor fix for debug statements in apps.plugin