Fixes

HotFix: Handle the failure when parsing batch keys in batchGet API

HotFix: Updated the C client tag to use 3.1.2 version of C client.

Features and Fixes

Feature - Implemented scanAggregate API along with example, test cases and documentation.

Feature - Updated the nodejs implementation to use latest C client API to be compatible with C API changes.

Feature - Update the C client tag to 3.0.96 so that nodejs API is compatible with latest C client

Fix - to match the enum definitions in C and nodejs for indextypes

Fix - buffer allocation for digest in key - solves crashing nodejs application under huge load.