Fixed wrong heroic values

Changed heroic difficulty values
Changed the cost of some new call ins
Added 2 new fortifications

Introduced 3 new star call ins - heavy arty barrage, light mortar barrage, and smoke screen

Greatly reduced payback amount
Added new emplacement types

Decreased enemy army sizes due to big FPS drops
All difficulties except heroic got the enemy research speed in early and middle game reduced
Air strikes resupply cost has been reduced to encourage its usage

Reduced officer view range
Increased the area reveal of binocular
Increased enemy army size at the start of the game
Increased blast damage by 25%
Increased resupply cost from the ammo truck for rocket artillery
Changed the number of flags on different stages of the campaign

Added 2 new fortifications (check the special tab for engineers)
Changed all difficulties. Now player has 20-25% more CP
Normal AI has a little bigger army when AI is attacking
Heroic AI has been reworked to include bigger and bigger reinfocements past minute 30 for the AI when AI is defending
MP and AP gain for corresponding missions has been increased
Starting MP has been increased