[WIP] ASIHTTPRequest hook

This will enable Nocilla to stub request made with ASIHTTPRequest. This will allow people to transition from ASIHTTPRequest (abandoned project) to something better maintained like AFNetworking.

- [x] Create hook.
- [x] Unload the hook on `stop`.
- [x] Remove dependency with JRSwizzle
- [x] If the stub_initWithURL method is named initStubWithURL it crashes (ARC)
- [x] Make sure that the new `main` method in NSOperation compliant. (Call `markAsFinished`)
- [x] Don't enable this hook by default.

Make it work with the following classes:
- [x] ASIHTTPRequest
- [x] ASIFormDataRequest
- [ ] ASIWebPageRequest
- [ ] ASICloudFilesRequest
- [ ] ASIS3Request