.gitignore cleanup

- Escaping hash for emacs temp files so it is not a comment line
- *.iml is covered by .idea/
- multi_inventory.yaml is unused
- Only ignore the root ansible.cfg, we have another ansible.cfg
  `git ls-files -i --exclude-standard`
- .tox and cover are directories

.gitignore

@@ -1,7 +1,6 @@
 *~
-#*#
-.idea
-*.iml
+\#*#
+.idea/
 *.komodoproject
 .loadpath
 .project
@@ -15,15 +14,14 @@
 .DS_Store
 gce.ini
 multi_ec2.yaml
-multi_inventory.yaml
 .vagrant
 .tags*
-ansible.cfg
+/ansible.cfg
 *.retry
 .vscode/*
 .cache
-.tox
+.tox/
 .coverage
 *.egg-info
 .eggs
-cover
+cover/