Features:
1. In the map "Frozen Valley", each player can get a Gaint unit by completing the quest.
The Frost Lord: Can cast frost nova to freeze enemies in a large area.
The Forest Lord: Can cat Tranquility to heal friendly units nearby.
2. Guard Point can heal the units of player who capture it first.
3. Easy and Normal AI will has less resource income. Easy AI will have a slower speed of making decision.
4. The HP of Gryphon summoned by Ranger was reduced to 800/1200/1600
Bug Fix:
Fix a bug that hero can learn abilities even they are not avaible.
Fix a bug that Gryphon, Raptor, Water Element, Earth Element, Wind Serpent do not have unit voices.
