Install script should also update ~/.bash_profile

[chriskwan]

I was installing nvm on Mac OSX 10.11.1 and ran the install script in the README, which added the following line to my ~/.bashrc:

export NVM_DIR="$HOME/.nvm"
[ -s "$NVM_DIR/nvm.sh" ] && . "$NVM_DIR/nvm.sh"  # This loads nvm

But when restarting my shell, I got: -bash: nvm: command not found

I resolved this by adding the line above to my ~/.bash_profile instead. Maybe the install script should also do this in case other people have this issue (more info about ~/.bashrc vs ~/.bashprofile: http://stackoverflow.com/a/415444)

(Note: you could also add [[ -r ~/.bashrc ]] && . ~/.bashrc to ~/.bash_profile to make it load the ~/.bashrc file.)

[ljharb]

Detecting which profile file is the right one to install into turns out to be incredibly difficult. Any (tested) PRs to improve this are always welcome.