Add NVM prompt segment
Add NVM prompt segment

Prints out the Node version that is currently active if it is different than the default version specified by NVM

MarvinTeichmann/powerlevel9k,natemccurdy/powerlevel9k,shibumi/powerlevel9k,shibumi/powerlevel9k,andjscott/powerlevel9k,MarvinTeichmann/powerlevel9k,zer4tul/dotfiles,bhilburn/powerlevel9k,andjscott/powerlevel9k,dritter/powerlevel9k,dritter/powerlevel9k,natemccurdy/powerlevel9k,bhilburn/powerlevel9k,rjorgenson/powerlevel9k,rjorgenson/powerlevel9k,zer4tul/dotfiles