Balance update on Coalhorn riflemen. Range set to 3 from 4. Movement set to 1 from 2.

Added few UI improvements for Mac Retina Display.

Fixed a critical bug where troops were reduced to 0 but the player could keep playing.
Fixed a critical bug where troops reduced to 0 didn't trigger the defeat condition in hex based battles.
Fixed various typos.
Fixed UI of assemble squads dialogue showing incorrect number of total squads when it's initially loaded.