Patch 1.139 file

> - Troops can now upgrade properly
> - Fixed bug with grenades exploding at wrong location
> - Squad size limitation bug is fixed for multiplayer
> - An update is made for preventing graphics glitch on some ATI cards
> - Several text corrections for all languages
> - Scene fixes mainly on the custom battles and village/town scenes
> - Fixed a quest bug with persuading Obuhovich
> - AI behavior changed so that musketeer troops can now close up on the enemy properly