Correct fish post install message.

Closes #234, #128.

install.py

@@ -105,13 +105,18 @@ def parse_arguments():
 
 def print_post_installation_message(etc_dir):
     aj_shell = '%s/autojump.sh' % etc_dir
-    if platform.system() == 'Darwin' and get_shell == 'bash':
+    source_msg = "\t[[ -s %s ]] && source %s\n" % (aj_shell, aj_shell)
+
+    if get_shell() == 'fish':
+        rcfile = '~/.config/fish/config.fish'
+        source_msg = "if test -f %s; . %s; end" % (aj_shell, aj_shell)
+    elif platform.system() == 'Darwin' and get_shell() == 'bash':
         rcfile = '~/.profile'
     else:
         rcfile = '~/.%src' % get_shell()
 
     print("\nPlease manually add the following line to %s:\n" % rcfile)
-    print("\t[[ -s %s ]] && source %s\n" % (aj_shell, aj_shell))
+    print(source_msg)
     print("Please restart terminal(s) before running autojump.\n")