Instruction comments

[SimonWaters]

Install could suggest packages "mongodb curl g++ " where it suggests installing "dev" packages, as these are necessary to complete install, and not included in Wheezy minimal build.

The context in which you run the "npm" commands in README.md not clear to people not use to npm, I guessed, and got a user with insufficient permissions, but the right directory. "You need to be in directory files checked out to.." and what user/permissions are expected to run the command."