Version 1.4.2: bug fix

Version 1.4.2 of Merc Tactics has been released today. This fixes the following bugs:

•  HUD does not disable buttons properly allowing posture change even when APs are zero
•  HUD does not update rotate / throw grenade button properly
•  HUD does not update door button correctly
•  opening door sequence can get confused when one mercs is opening door and player switches focus to another merc
•  The game waits for any unexploded grenades to explode before starting next squads turn
• The turn sequence can hang if a grenade explodes at same time as interrupt
•  AI shoots at any new enemy discovered, even if moving to cover
•  AI exists defend building mode if any enemy within effective range
•  Sometimes AI continually opens and closes door
•  AI doesn't throw grenade if friendlies nearby

Game saves are compatible with the previous version.