m.js: GT.M binding for Node.js

Node.js binding to the GT.M hierarchical (MUMPS) database. The current version is 0.1.0-56-g1b5486c (pre-release from git). The package wraps the GT.M C API to allow Node.js to read and write to GT.M global nodes. It uses GNP (GT.M Network Protocol) or direct call-in. Key differentiator: it is the only Node.js binding for GT.M with native bindings, but it is experimental and uses a pre-1.0 version. It requires GT.M to be installed and configured.