Demo Patch

Another little patch for the current demo covering some of the feedback received and other major and a few minor points.

• Multiple items can be bought in the shop
• Deleting a module only removes it from its slot and puts the respective module in storage
• Weapon Swapping
• Implementing "Character" to "Crew" renaming
• Cleaner crew selection
• Minor Bugfixes
• UI optimization
• Polishing
• Balancing