Added Yii basic command completion

plugins/yii/yii.plugin.zsh

+# Yii basic command completion
+
+_yii_get_command_list () {
+	protected/yiic | awk '/^ - [a-z]+/ { print $2 }'
+}
+
+_yii () {
+  if [ -f protected/yiic ]; then
+    compadd `_yii_get_command_list`
+  fi
+}
+
+compdef _yii protected/yiic
+compdef _yii yiic
+
+# Aliases
+alias yiic='protected/yiic'