Patch 0.7.4

- Fixed player character reaction to grenade explosion, camera shaking added
- Added voice acting for story characters throughout the main story (WIP)
- Chapter 4 now ends correctly - added previously missing level 'Gam-Palace'
- Fixed bugs in some dialogues, due to which the conversation went to the uncorrect lines
- Improved the first appearance of the agent at the 'Market' level
- Fixed minor technical bugs