Time delta output shows incorrect values when the MSB of deltaflags is set.
Time delta output shows incorrect values when the MSB of deltaflags is set.

This closes #67.

Change-Id: I0598d5b61783387cd7a97daf38517cd3bcb0f421
Signed-off-by: Benoit Sigoure <1e23a9b864bbfcd2c432e234ca9d6011db05a743@stumbleupon.com>

OpenTSDB/opentsdb,MadDogTechnology/opentsdb,andyflury/opentsdb,ShefronYudy/opentsdb,OpenTSDB/opentsdb,johann8384/opentsdb,alienth/opentsdb,alienth/opentsdb,sidhhu/opentsdb,sidhhu/opentsdb,ShefronYudy/opentsdb,MadDogTechnology/opentsdb,andyflury/opentsdb,MadDogTechnology/opentsdb,johann8384/opentsdb,OpenTSDB/opentsdb,eswdd/opentsdb,kidaa/opentsdb,eswdd/opentsdb,kidaa/opentsdb