fix for APVerticalMode where only flare mode is avaliable
Altitude Radio overflow correction samples inc. 20

Number of masked Altitude Radio overflow correction samples has been increased to 20 from 10.
Fix for max_val in overflow correction

Airbus aircraft rollover at different values. Originally my mistake to change it for A320.
added check for valid ils localiser data within approach for ils established flight phase
updated CHANGES for v0.7.1
updated changes for 0.7.2
updated CHANGES and removed .dev tag preparing for release
Bump version: 0.7.1 → 0.7.2