Fix htsmsg_json_write() to write HMF_DBL values correctly. Update htsmsg_get_dbl() to handle string and int values. Note: float/double values in JSON must be locale independent ie use period for decimal point.
Added GOTOX/USALS rotor support to diseqc.c
Added Rotor latitude, longitude, and delay to Adapter configuration. Added Rotor type and position to Satellite config. Latitude and longitude values are in decimal degrees. (Use negative values for south and west). Split dvb_fe_tune into two functions to support controlling rotor and waiting for rotor delay.