Adding a symfony plugin, for symfony 1

plugins/symfony/symfony.plugin.zsh

+# symfony basic command completion
+
+_symfony_get_command_list () {
+    ./symfony | sed "1,/Available tasks/d" | awk 'BEGIN { cat=null; } /^[A-Za-z]+$/ { cat = $1; } /^  :[a-z]+/ { print cat $1; }'
+}
+
+_symfony () {
+  if [ -f symfony ]; then
+    compadd `_symfony_get_command_list`
+  fi
+}
+
+compdef _symfony symfony