Added functions to find Hamming distance and cardinality/number of 1 bits in a byte.
Merge branch 'derp' into devel
Fixed error printing bug in DBP

Previously errors were printed to Std err even if ERROR_AS_SYSTEM_ERROR
was false
Fixed bug in DBP with uninitialized singletons.
Fixed bug in CLP with unrecognized option args.
rebuilt jar
Rebuilt jar with source
Merge v3.1 from devel