Update FlashMessenger.php

Hello, the feature of rendering is fantastic, but you can not print the current message, this second method would make this work.
Hide sub menus if all pages in the sub menu is hidden.
Simplifying code for previous commit
Adjusting as requests ;)
Ajusting
Ajusting
Ajusting
Ajusting
Delete duplicate code
Ajusting
Ajusting
Memcache cache adapter: in progress, completed Options and ResourceManager
Memcache adapter complete, passing tests
Fix MemcacheResourceManagerTest, updates from code review
Fix code style in MemcacheResourceManager
Updates/fixes from marc-mabe code review
Revert removed get multiple value internal methods; instead, remove set multiple value internal method
Determine memcache adapter capabilities based on stable or beta version
Force memcache delete 2nd arg to 0
Remove lib_options in favor of get/set compress threshold options