The beta version of redis with some annotations added.

It is worth learning the design idea of redis via the first version. I have made following changes in order to study the codes more easily:

1. Delete unused files and functions;

2. Split the redis.c into redis.h and redis.c to make the source file shorter;

3. Rename some variables and functions;

4. Sort the implementation of functions according to their declaration;

5. Unify the code format, including brackets and spaces.

6. Add 'static' to local functions.

Fortunately, the codes are very short after these changes (3,000 code lines). Enjoy it!

Several notes on Redis are available on my blog: http://blog.csdn.net/jsc0218/article/details/21280821.