Added the path plugin.

plugins/path/path.plugin.zsh

@@ -0,0 +1,23 @@
+# Path Plugin
+# -----------
+# Adds each line from $HOME/.path to your PATH variable.
+# Environment variables will be evaluated in this file for you, so you
+# can use references like $HOME/bin.
+#
+# Use `reload_path` to update $PATH if you change $HOME/.path
+
+function reload_path() {
+    if [ $CUSTOM_PATH ]; then
+        # Determine what the original path was before we modified it be removing
+        # our CUSTOM_PATH.  This way we don't double-up entries on the path when
+        # manually calling reload_path.
+        export ORIGINAL_PATH=$(echo $PATH | sed "s|$CUSTOM_PATH||")
+    else
+        export ORIGINAL_PATH=$PATH
+    fi
+    export CUSTOM_PATH=$(eval echo $((while read x; do echo -n "$x:"; done < $HOME/.path) 2> /dev/null || echo ""))
+    # CUSTOM_PATH ends with a trailing colon (:) so no need to provide it here.
+    export PATH=${CUSTOM_PATH}${ORIGINAL_PATH}
+}
+
+reload_path