edges' values got passed to and fro between neighbors ( >=4 partitions )
edge-double.c: minor malloc() correction
edge-double.c (right partition right boundary alligment (revert ae43e0f91646698b512cac99c1c7617e51472b98)
worker-to-worker communication (double)
minor correction on tag's remark and recv buffer
inter-neighbor communication ( >=4 partitions)