Trivial comment editing of example code.
Now, sources and XMLs use insert-your-apikey-here string to inform about API-key usage. Then, the place holder string is same as used in FMI open data manual.
Trivial readme editing. Unnecessary comments removed.
Build guide edited to inform about npm usage. Instead of installing modules one by one, single npm install can handle it all automatically.

Also, grunted the whole thing after testing npm install.
Removed unnecessary definition lines from package.json.
Merge branch 'master' of https://github.com/fmidev/metolib
Minor edit to test file to pass grunt code check for source.
Grunt run to compile latest lib files. Also, version changed to 1.0.1. to describe that changes have occurred after 1.0.0.