PHP extension for interfacing with Redis

This extension provides an API for communicating with Redis servers.

phpredis 3.1.1RC2

* Additional test updates for 32 bit systems (@remicollet)
* ARM rounding issue in tests (@remicollet)
* Use new zend_list_close instead of zend_list_delete when reconnecting.
* Refactoring of redis_boolean_response_impl and redis_sock_write (@yatsukhnenko)

phpredis 3.1.1.RC1

This release contains mostly fixes for issues introduced when merging
the php 5 and 7 codebase into a single branch.

* Fixed a segfault in igbinary serialization (@yatsukhnenko)
* Restore 2.2.8/3.0.0 functionality to distinguish between an error
and simply empty session data. (@remicollet)
* Fix double to string conversion function (@yatsukhnenko)
* Use PHP_FE_END definition when available (@remicollet)
* Fixed various 'static function declared but not used' warnings
* Fixes to various calls which were typecasting pointers to the
wrong size. (@remicollet)

* Added php session unit test (@yatsukhnenko)
* Added explicit module dependancy for igbinary (@remicollet)
* Added phpinfo serialization information (@remicollet)