Implement Generators
Merge fixes
Add new zend tests, fixes, improvements
Merge pull request #156 from jphp-compiler/feature/php-5-5/generators

Implement Generators
Update README.md
Spl Classes
Small fixes
Merge pull request #157 from jphp-compiler/spl-classes

Spl classes
Add namespace option to extension class
Add nullable option of arguments for internal api
Improve ArrayMemory api: add toMap methods
Add enum support for internal api
Add enum support for internal api
Improve internal api
Improve wrap api.
Improve wrap api
Add new supported binding types for wrapping native classes
Improve wrap api: add BaseWrapper