Added missing methods for INCRBY (long) and INCRBYFLOAT for both standard keys as well as hashes
Fixed command for HIncrbyFloat (was using HINCRBY instead of HINCRBYFLOAT)
Fixed command for IncrByFloat
Merge branch 'v3-fixes' into v3
Merge pull request #193 from jpasichnyk/v3

INCRBY, HINCRBY, and HINCRBYFLOAT changes