Add .nvmrc + .npm-version to package.json
Add .nvmrc + .npm-version to package.json

Closes #245

In the last release the two files haven't been published to npm and caused an error.
Adding these two files to the white list fixes it.

phovea/generator-phovea,phovea/generator-phovea,phovea/generator-phovea,phovea/generator-phovea,phovea/generator-phovea