Fix #498 Issue about SplFileInfo
Added tests for extends of Spl supported classes
Support more stl classes (with tests)
Fix #502 about abstract classes use interface methods
Updated
Anonymous functions/closures support at parsing level
Merge pull request #499 from ovr/498_issue

Fix #498 and support more STL clases
Anonymous functions/closures support at parsing level (2)
Merge branch 'master' of https://github.com/phalcon/zephir
Anonymous functions/closures support at parsing level (3)
Adding Zephir\Closure to create closures
Adding initial closure tests
More tests for Closures
TDD #506 Issue
Fix #506 Issue about string escape in ThrowStatement for message
Merge pull request #512 from ovr/506_issue

506 issue
Introducing filesystem abstraction, fixed escaping of single quotes in strings, improved closure support
PSR2 fixes
Cache md5hashes to improve performance
Fixed class escaping, added Apc filesystem