https:// instead of git://

I had a problem to git pull with the current url:
```
c:\wamp\www\myplay_node_3>git clone git://github.com/strongloop/express.git
Cloning into 'express'...
fatal: unable to connect to github.com:
github.com[0: 192.30.252.128]: errno=No such file or directory
```
so i updated the link with https:// instead of git:// and it worked
```
c:\wamp\www\myplay_node_3>git clone https://github.com/strongloop/express.git
Cloning into 'express'...
remote: Counting objects: 26224, done.
remote: Compressing objects: 100% (31/31), done.
remote: Total 26224 (delta 18), reused 0 (delta 0)
Receiving objects: 100% (26224/26224), 10.25 MiB | 167.00 KiB/s, done.
Resolving deltas: 100% (11641/11641), done.
Checking connectivity... done.
```