Updated Libmemcached::flush and Memcache::flush
fix #2401: cache for aggregating model methods
added test for aggregating functions' cache
fixed test for aggregate functions
Update collection.c
Replace \n with PHP_EOL
Fix #2407 add FOR UPDATE clause
Fix error method name
Merge pull request #2715 from dreamsxin/model_forupdate

Fix #2407 add FOR UPDATE clause
Merge pull request #2720 from dreamsxin/mvc_dispatcher

Fix error method name
Merge pull request #2690 from WooDzu/patch-2

[1.3.3] Fix: ViewEnginesVoltTest
Merge pull request #2640 from maxgalbu/aggregators_cache

Fix aggregate functions cache
Merge pull request #2595 from dreamsxin/cache

Updated Libmemcached::flush and Memcache::flush