Some fish shell configuration changes

terminal/fish/config.fish

@@ -1,8 +1,8 @@
-set -x DOTFILES /Users/thomas/dotfiles
+set -x DOTFILES $HOME/dotfiles
 # The definition of $DOTFILES MUST be the first line of this file
 # Don't change it!
 
-if test "$SHLVL" -le 1
+if test -z "$FISH_SETUP_PATH"
   # Homebrew path
   set -x PATH /usr/local/bin /usr/local/sbin $PATH
   # Personal scripts
@@ -20,4 +20,6 @@ set -x LC_ALL sv_SE.UTF-8
 set -x EDITOR vim
 alias v vim
 
-eval (python3 -m virtualfish)
+if not is_ssh_agent_running
+  ssh_agent_start
+end