Fix INFO and BGREWRITEAOF

This fixes the parsing of the response of the INFO and BGREWRITEAOF
commands on OS X with the following Redis version:

     Redis server
     v=2.8.11
     sha=00000000:0
     malloc=libc
     bits=64
     build=cd43e547b41f72f

In order to start the `redis-server` with the configuration file
redis.conf I removed everything but the password. The rest will
default to the settings that's used by the version of redis-server
that's installed. This was required as my version of redis-server
wouldn't start with the configuration file as it were.
Add support for new optional arguments of SET

From the redis documentation

    Starting with Redis 2.6.12 SET supports a set of options that
    modify its behavior:

    EX seconds -- Set the specified expire time, in seconds.
    PX milliseconds -- Set the specified expire time, in milliseconds.
    NX -- Only set the key if it does not already exist.
    XX -- Only set the key if it already exist.
Update README slightly.
Generate new `oasis setup` files