use 2.8 as the default server version
fix #154
original array format
Merge remote-tracking branch 'thbourlove/server_info' into v0.8
Update CHANGELOG.
Failures for PHP 5.6 on Travis CI are not allowed anymore.
Merge remote-tracking branch 'thbourlove/v0.8' into v0.8
Update CHANGELOG and README.
Enable INCRBYFLOAT in cluster mode
add phpunit as dev requirement
isntall requirement with a better way
use phpunit 4.x instead of 3.x
Merge remote-tracking branch 'github/pr/170' into v0.8
Merge remote-tracking branch 'github/pr/159' into v0.8
Update CHANGELOG.

[ci skip]

Meh
New commands: PFADD, PFCOUNT, PFMERGE (Redis 2.8.9).

Backported from the master branch.

Many thanks to @rubensayshi for his initial commits on this in #163,
but I had to start from scratch for the master branch first.
Skip integration tests for HyperLogLog commands on Redis < 2.8.9.

Caught this by running the test suite on TravisCI which still runs an
older version of Redis 2.8. We should find a more decent way to handle
differences in profiles when commands get added between patch releases
of Redis, our custom skip method will do for now.
Fix parsing of the output of CLUSTER NODES to fetch slots map.

There was an error in presence of slaves in the cluster configuration,
see #165 for reference.
Update CHANGELOG.

[ci skip]
New command: ZLEXCOUNT (Redis 2.8.9).

Closes #176.