Merge pull request #28 from FunBing/fixspelling

fix comment's spelling in rax.h

Rax.c: populate data field after random walk.

Fix divide by zero in raxRandomWalk().

Write the version inside rax.c. Increment at every bugfix.

Add regression test for issue #25.

Avoid compiler warning by handling default case.

if -> else if: no actual bug, fortunately.

Fix raxSeek() not populating it->data in certain conditions (Issue #25).

Cluster fuzz test: report final number of keys.

Cluster fuzz mode: emulate Redis issue 5693 more closely.

No cluster test by default.

Test to simulate Redis Cluster workloads.

Add iterator benchmark.

README: add info about debugging Rax.