psr 1.1.0

PSR interfaces

This extension provides the accepted PSR interfaces, so they can be used in an extension.

See http://www.php-fig.org/psr/

License: BSD-2-Clause

Changes

- Update psr/container to 1.1.1
- Add version ID constants to each header
- Use __dllspec(dllimport) where appropriate in php_psr.h on windows