feat(docs): add cluster size guide
docs(README.md): update client libraries and projects.
This commit adds information about API version support for all
clients - clearly listing which clients support API v2.

Also, a new nodejs client is added, and a new project as well.
Merge pull request #438 from robszumski/master

feat(docs): add cluster size guide
Merge pull request #439 from lavagetto/master

docs(README.md): update client libraries and projects.
feat(README): splitup the sections into individual files

The README is getting rather large so split it into individual files.

The next step will be rendering these into HTML pages with a TOC so that
they are a bit more navigable.

What do people think of this?
fix(README): link to the configuration file too
fix(Documentation): fixup headers

fixup the headers on the api and tuning sections
Merge pull request #440 from philips/splitup-README

feat(README): splitup the sections into individual files
Merge remote-tracking branch 'upstream/master'