Generate 64 bit id for internal lookup

Store the stringified id from chanellist into a 64 bit integer, which will be
used for matching epg data.

Signed-off-by: Julian Scheel <julian@jusst.de>

src/OctonetData.h

@@ -30,6 +30,7 @@
 
 struct OctonetChannel
 {
+	int64_t nativeId;
 	std::string name;
 	std::string url;
 	bool radio;