Issue 136: Added enum RescalingMode {AUTOMATIC, MANUAL} to CKKS scheme
closes #136 (closed)
Added enum RescalingMode {AUTOMATIC, MANUAL} to CKKS scheme escalingMode is responsible for AUTOMATIC or MANUAL rescaling. RescalingTechnique {EXACTRESCALE, APPROXRESCALE} is responsible for selection of primes and and scaling factors. Cleanup of CKKS and BGVrns implementations.