added nvmrc with usage of stable Node.js version

[gAmUssA]

No description provided.

[mustafaiman]

Let's say a person uses nvm. She clones the repo and she does not have latest stable version installed on her computer. Does nvm automatically downloads the latest stable when she tries to run this project? What if she does not want to install the latest version?

[gAmUssA]

@mustafaiman A developer needs to run nvm use to tell nvm to use stable node version (available in the system. A developer can install any version with nvm install v.5.9.1 for instance).

$ nvm use
Found '/Users/apple/projects/hazelcast/hazelcast-nodejs-client/.nvmrc' with version <stable>
Now using node v5.4.1 (npm v3.3.12)

If she for some reasons don't want to use stable she can tell to use a particular version with nvm use v5.4.1.
Or even use already installed (not with nvm) node binaries with nvm use system.
I will provide setup instructions in README.adoc later

[mustafaiman]

👍