Wurfl-cloud

- Bugfix: Non-default umasks no longer cause cache files to be written with wrong permissions

- Enhancement: Added full support for PHP 7
- Enhancement: Added support for APCu to the APC cache adapter
- Bugfix: Fsock adapter should use HTTP/1.0 to avoid chunked transfer encoding

- Enhancement: Added support for Google App Engine and documentation for using Cloud Storage for caching.
- Enhancement: Added `HttpClient\FileGetContents` for use without `curl` or `fsock`.
- Enhancement: Added support for Guzzle 6+ through new adapter `HttpClient\GuzzleHttp`.
- Enhancement: Added Docker test runner via `docker-compose`.
- Bugfix: CURL adapter would not use compression even with `use_compression = true`.

- Enhancement: Reduce PHP version constraint from 5.4 to 5.3.

- Enhancement: Open source cloud client.

- Bugfix: CURL adapter fails with multiple calls to Client::detectDevice()