Add support for Latitude-Longitude filter.
Move priority of latlongfilter to priority.h.
Update augmentation_loop.h

Added augmentorAgents attribute to Entry struct to store the agents needed for each augmentor
Update augmentation_loop.cc

Storing the agents needed for each augmentor and sending them to the augmentors in doAugmentation method
Update augmentation_loop.cc

removed unnecesary if
added SMOVE command to redis
added a is member of set command and an exists command
added unit testing for SMOVE, EXISTS and SISMEMBER commands
Add small optimization to Lat/Long device filter.

This improves time when configurations has not the mentioned filter
set.
antoi: accept numbers starting with "+"
bit_range_ops: replace "int" indexes with "shift_t" ones to avoid signing errors
bit_range_ops: reverted slightly too zealous modification