PHP sample is broken

[BafS]

The PHP sample is totally broken

• The readme is almost empty and doesn't give much instruction
• The Chargebee library used is legacy, it doesn't use namespaces
• We need to manually download chargebee/stripe library (we don't know which version) and move the source files under php/php_src/lib/
• We don't load the composer autoload.php, yet we don't include Guzzle which is a dependent library
• The example doesn't work with apache (because of the rewrite), would be great to have it working with the built-in PHP server
• Of course type-hints, PSR2+ syntax, tests etc. would also be welcome