bin script unusable on windows

[uuf6429]

Composer typically ensures compatibility between operating systems - what the plugin vendor needs to do is to provide a PHP-based bin script, not bash or anything else.

Currently, the bin script (as referenced from composer.json) is wrong - composer doesn't consider it as PHP and ends up generating the wrong type of proxy script.

The fix, in short:

1. cmd/s2c should be removed
2. cmd/s2c.php should be renamed to cmd/s2c and optionally made executable with chmod +x

Here's an example of how phpunit does it: the script, the composer reference