XCache emulation with APC
AnnotationsAdaptersTest: APC and XCache adapters
ModelsMetadataAdaptersTest: XCache adapter
Fix #866
Updated unit test
Merge pull request #865 from sjinks/tests

Add several missing APC and XCache tests
Do not heavily depend on session
Merge pull request #872 from kjdev/1.2.1

dot directive parsing of ini files.
Merge pull request #873 from sjinks/issue-866

Phalcon\Mvc\Model\Criteria::fromInput() does not set _modelName
Merge pull request #875 from sjinks/cookie-session

[NFR] Make Phalcon\Http\Cookie less depend on session
Update simple.c

Updated function comments for better readability & grammar
Merge pull request #879 from quasipickle/patch-1

Update simple.c
Added Phalcon\Cache\Backend\Libmemcached

cache backend class by using memcached PECL extension.