Update README with GNRMC, GNGGA, and GLGSV sentences

README.md

@@ -16,16 +16,18 @@ After this command *go-nmea* is ready to use. Its source will be in:
 
 At this moment, this library supports the following sentence types:
 
-- [GPRMC](http://aprs.gids.nl/nmea/#rmc) - Recommended minimum specific GPS/Transit data
-- [GPGGA](http://aprs.gids.nl/nmea/#gga) - Global Positioning System Fix Data
+- [GPRMC](http://aprs.gids.nl/nmea/#rmc) - Recommended Minimum Specific GPS/Transit data
+- [GNRMC](http://aprs.gids.nl/nmea/#rmc) - Recommended Minimum Specific GNSS data
+- [GPGGA](http://aprs.gids.nl/nmea/#gga) - GPS Positioning System Fix Data
+- [GNGGA](http://aprs.gids.nl/nmea/#gga) - GNSS Positioning System Fix Data
 - [GPGSA](http://aprs.gids.nl/nmea/#gsa) - GPS DOP and active satellites
-- [GPGSV](http://aprs.gids.nl/nmea/#gsa) - GPS Satellites in view
+- [GPGSV](http://aprs.gids.nl/nmea/#gsv) - GPS Satellites in view
+- [GLGSV](http://aprs.gids.nl/nmea/#gsv) - GLONASS Satellites in view
 - [GPGLL](http://aprs.gids.nl/nmea/#gll) - Geographic Position, Latitude / Longitude and time
 - [GPVTG](http://aprs.gids.nl/nmea/#vtg) - Track Made Good and Ground Speed
 - [GPZDA](http://aprs.gids.nl/nmea/#zda) - Date & time data
 - [PGRME](http://aprs.gids.nl/nmea/#rme) - Estimated Position Error (Garmin proprietary sentence)
 
-I will implement new types whenever I find some time. Also feel free to implement it yourself and send a pull-request to include it to the library.
 
 ## Example
 
@@ -44,3 +46,7 @@ func main() {
   }
 }
 ```
+
+## Contributions
+
+Please, feel free to implement support for new sentences, fix bugs, refactor code, etc. and send a pull-request to update the library.