Work with ssh:// scheme

For watever reason, when I clone my repositories I get a repository url
qualified with the ssh:// scheme, which Minilla doesn't seem to expect:

```
   url = ssh://git@github.com/lestrrat/Data-Localize.git
```

This creats all sorts of havoc in the META.json resources section:

```
   "resources" : {
      "bugtracker" : {
         "web" : "https://ssh///git@github.com/lestrrat/Data-Localize/issues"
      },
      "homepage" : "https://ssh///git@github.com/lestrrat/Data-Localize",
      "repository" : {
         "type" : "git",
         "url" : "git://ssh///git@github.com/lestrrat/Data-Localize.git",
         "web" : "https://ssh///git@github.com/lestrrat/Data-Localize"
      }
   },
```

This change fixes this by checking for the ssh:// scheme when stripping
git@ username from github repository URLs