v1.3.0

- Added TX power management.
- Added full support for SX1301 reference board.
- Changed build system with configuration for multiple chip/radio/band support.
- SX125x bandwidth set to 1MHz by default (was 800 kHz).
- Solved warnings with 64b integer printf when compiling on x86_64.
- Renamed helper programs to reduce the concentrator vs. gateway confusion.