Release v0.6.0 on 2019-01-21.

1. 735e435 Use explicit type for pcu_lsb() by Max · 6 years ago
2. 20c7c46 Add tests for pcu_lsb() by Max · 7 years ago
3. 9dabfa2 Cleanup FN scheduling by Max · 7 years ago
4. 8cba7e9 utils: Add pcu_bitcount and pcu_lsb by Jacob Erlbeck · 8 years ago
5. 0c1c877 tbf: Use a hysteresis when discarding DL LLC frames by Jacob Erlbeck · 9 years ago
6. 3bed5d1 tbf: Implement delayed release of a downlink TBF by Jacob Erlbeck · 9 years ago