Native memory_get_usage()
Use zend_zval_type_name() instead of userspace gettype()
Use native json_encode() and json_decode()
Use native session functions
Native headers_sent()
Use native header()
JSON - PHP 5.3 compatibility
Use native debug_backtrace()
phalcon_lcfirst() and phalcon_ucfirst()
Use phalcon_lcfirst() instead of userspace lfirst()
Compatibility with PHP 5.3
Bug fix, have more sleep
Native ob_get_level()
Compatibility with PHP 5.3
Updated gen-build [ci skip]
Make sure single file versions build [ci skip]
Rebase
Fix for old PHP 5.3.x
Merge pull request #836 from sjinks/native-funcs

Use native functions
Corrected typos that don't allow the build in Windows to proceed