add fish config

fish/.config/fish/config.fish

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+## PATH
+
+set -x PATH $PATH ~/.local/bin ~/.go/bin
+set -x EDITOR nano
+
+## Go utils
+
+set -x GOPATH ~/.go
+
+
+function bind_bang
+    switch (commandline -t)[-1]
+        case "!"
+            commandline -t $history[1]; commandline -f repaint
+        case "*"
+            commandline -i !
+    end
+end
+
+function fish_user_key_bindings
+    bind ! bind_bang
+end

fish/.config/fish/functions/email.fish

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+function email --description 'Opens mutt with a specific account (waarp|perso)'
+    set account waarp
+	set usage 'Opens mutt with a specific account (waarp|perso)'
+
+	if test (count $argv) -gt 0
+		switch $argv[1]
+			case -h --help
+				echo $usage
+				return
+			case waarp perso bcarlin
+				set account $argv[1]
+			case '*'
+                echo "Bad account!"
+				echo $usage
+                return
+		end
+	end
+
+	env EMAIL_ACCOUNT=$account mutt
+end