Add support for version 3.04 of RINEX files
Orekit supports RINEX versions 2.00, 2.10, 2.11, 2.12, 2.20, 3.00, 3.01, 3.02, and 3.03 for observation files. The new RINEX format 3.04 (ftp://igs.org/pub/data/format/rinex304.pdf) is not supported yet. This format is very close to the ones already supported by Orekit.
Edited by Bryan Cazabonne