run local version of npm commands instead of globally installed

npm-exec.sh

# Add to your ~/.bash_profile

# Usage: npm-exec (command) [...args]
#   Execute a command located in an npm bin directory, without
#   having to manually path to it
function npm-exec() {
  bin="${1}";
  shift 
  args="$*"
  "$(npm bin)/${bin}" ${args};
}