Adds comments to LibraryHookInterface.
Factory creates now instances even when there is no factory method defined.
Renames Curl library hook to CurlRunkit.
Adds .gitignore file.
Implements first draft of an alternative to runkit overloading of curl functions.
Extracts duplicate code from CurlRewrite and CurlRunkit to \VCR\Util\CurlHelper.
Removes unnecessary code, adds documentation.