Correct capatilization of git repo

The `cordova plugin add https://github.com/initsogar/cordova-webintent.git` fails for me with the following error:

```
[Error: Error fetching plugin: Error: Command failed: remote: Repository not found.
fatal: repository 'https://github.com/initsogar/cordova-webintent.git/' not found
]
```

`cordova plugin add https://github.com/Initsogar/cordova-webintent.git'`works