Merge pull request #121 from vincentbernat/fix/phpinfo-test

Test moduleinfo test
Merge pull request #119 from vincentbernat/fix/compress-serialized

Fix compression of serialized objects.
Merge pull request #120 from vincentbernat/fix/compression-bigendian

Fix compression on big-endian architecture
`getServerByKey` cannot report weight anymore

Due to a change in libmemcached (exposed in
5450f45a3ee9ca520c108a043dd10fbe9b5535ac), `getServerByKey` is not able
any more to report a server weight. It reports 0 instead. This makes the
test on this function fails. We fix this by expecting a weight of 0
instead of a weight of 1.
Move `getserverbykey` test out of experimental