upgrade to smarty 3.1.7

bundled-libs/Smarty/change_log.txt

@@ -1,4 +1,29 @@
-===== Smarty-3.1.6  =====
+===== Smarty-3.1.7 =====
+18.12.2011
+- bugfix strings ending with " in multiline strings of config files failed to compile (isse #67)
+- added chaining to Smarty_Internal_Templatebase
+- changed unloadFilter() to not return a boolean in favor of chaining and API conformity
+- bugfix unregisterObject() raised notice when object to unregister did not exist
+- changed internals to use Smarty::$_MBSTRING ($_CHARSET, $_DATE_FORMAT) for better unit testing
+- added Smarty::$_UTF8_MODIFIER for proper PCRE charset handling (Forum Topic 20452)
+- added Smarty_Security::isTrustedUri() and Smarty_Security::$trusted_uri to validate 
+  remote resource calls through {fetch} and {html_image} (Forum Topic 20627)
+
+17.12.2011
+- improvement of compiling speed by new handling of plain text blocks in the lexer/parser (issue #68)
+
+16.12.2011
+- bugfix the source exits flag and timestamp was not setup when template was in php include path (issue #69)
+
+9.12.2011
+- bugfix {capture} tags around recursive {include} calls did throw exception (Forum Topic 20549)
+- bugfix $auto_literal = false did not work with { block} tags in child templates (Forum Topic 20581)
+- bugfix template inheritance: do not include code of {include} in overloaded {block} into compiled 
+  parent template (Issue #66}
+- bugfix template inheritance: {$smarty.block.child} in nested child {block} tags did not return expected
+  result (Forum Topic 20564)
+    
+===== Smarty-3.1.6  =====
 30.11.2011
 - bugfix is_cache() for individual cached subtemplates with $smarty->caching = CACHING_OFF did produce
   an exception (Forum Topic 20531)