Library install: Disable php timeout and stream directly to file

This will minimize the amount of errors we'll get.
See the following for input on how it could be done: http://stackoverflow.com/a/6409531

Some implementations, like WP already have support for this:
```
$response = wp_safe_remote_get($url, array(
'stream' => TRUE,
'filename' => $file,
'timeout' => 60
));
```