making the build between Simgear and Flightgear consistent.
- Fix an issue with lib/lib64 path between CentOS/RedHat distributions
and Debian derived distributions.
- Fix a compilation issue with HLA in the Flightgear code.
- positions.txt and special.txt are integrated in the binary
- Reduce CPU load
- New mode: OBS for listening a frequency
- Source code ready to be used with another library
- Support for COM1 and COM2
- Fix bug where frequencies conflict avoid switching between similar frequency in range
- Better logging information and debug information
- Range depends on altitude