added (preliminary?) link code, tested on Win8.0
will test on Mac before merging into master
for #2
update README to have link section
better get of npm config value
doh!
Merge branch 'master' of https://github.com/PixnBits/sublime-text-npm into npm-link
platform difference for `prefix` config found, adapting
Merge pull request #7 from PixnBits/npm-link

npm link