Allow runtime configuration of Smarty via parameters in AgaviSmartyRenderer, closes #846
Fixed #848: AgaviSmartyRenderer should not set a Smarty plugins dir
merge ab3054e62cf69ba00007b83d5d0f92b20d2b397e...4119dde47048cc016c94a527163907731b5a2e81 (from 1.0)