Merge pull request #3 from johnlaing/master

add execv

Thanks a lot for this!  I started to realize that Redis was doing the 'splitting by whitespace' so we did indeed need a different entry point.  So thanks for adding it!
add hset and hget
Merge pull request #4 from armstrtw/master

add hset and hget

Thanks!
update ChangeLog with note re pull request #4
add convenience functions for set operations