Added 'ref' plugin

plugins/ref.plugin.bash

@@ -0,0 +1,36 @@
+ref() {
+	if [ ! -d "$REF_DIR" ]
+	then
+		mkdir -p "$REF_DIR"
+	fi
+
+	REF_DIR=${REF_DIR%/}
+
+	if [ "$1" = 'ls' ]
+	then
+		if [ "$2" = '' ]
+		then
+			builtin cd "$REF_DIR"
+			ls -G
+			builtin cd - > /dev/null
+			return
+		else
+			builtin cd "$REF_DIR"/"$2"
+			ls -G
+			builtin cd - > /dev/null
+			return
+		fi
+	fi
+
+	DIR="${1}/${2}"
+
+	builtin cd "$REF_DIR"/"$DIR"
+
+	if [ $(uname) = "Darwin" ]
+	then
+		open index.html
+	elif [ $(uname) = "Linux" ]
+	then
+		gnome-open index.html
+	fi
+}