Fix bad curl parsing due to weird Webflow api

Webflow is returning weird http response. Exemple:

```
HTTP/1.1 100 Continue

HTTP/1.1 400 Bad Request
Content-Type: application/json; charset=utf-8
X-RateLimit-Limit: 60
X-RateLimit-Remaining: 59
X-Response-Time: 2762.208ms
Content-Length: 874
Connection: keep-alive

{"msg":"Validation Failure","code":400.....}
```

Merge pull request #1 from jr-k/patch-1

Add webhooks API (List/Get/Create/Remove)

Merge pull request expertlead#7 from Beeldvoerders/WorkWithLiveItems

Support 'live' parameter for item create and update

Merge pull request expertlead#5 from assertchris/feature/improve-api

Improve API: fix items delete and update operations.

Add builds status

Preserve response headers, fix composer autoload

Create README.md, add psr-4 autoload

Create README.md

Port from official js sdk

Port from official js sdk