* oauth-develop: Add information about OAuth signing. Complete handling OAuth secured calls. Expose ENEscapeStringForURL C-function. Release previous keys in setters. Add secured endpoints array. Add private method for generating timestamps. Add utility class for signing/encoding. Move Base64Transcoder into src/. Add Base64 encode/decode C-functions Expose the HTTP param property. Change message to use the category prefix, enapi_ Add macro for checking OAuth keys. Add consumer key & shared secret for OAuth signing.