Add Laravel4 plugin

plugins/laravel4/laravel4.plugin.zsh

+# Laravel4 basic command completion
+_laravel4_get_command_list () {
+	php artisan --no-ansi | sed "1,/Available commands/d" | awk '/^  [a-z]+/ { print $1 }'
+}
+
+_laravel4 () {
+  if [ -f artisan ]; then
+    compadd `_laravel4_get_command_list`
+  fi
+}
+
+compdef _laravel4 artisan
+compdef _laravel4 la4
+
+#Alias
+alias la4='php artisan'
+
+alias la4dump='php artisan dump-autoload'
+alias la4cache='php artisan cache:clear'
+alias la4routes='php artisan routes'