Containment Zone 0-03

Small update in terms of playable content but I am doing a lot of work on the story behind the scenes. Next update will probably feature the story being finally playable albeit only up to a certain point because the story is gonna be too long for me to have done by the next update (obviously). Anyway, here's the patch notes.

> Maku can no longer equip weapons and his summary shown when selecting him has also been changed to reflect this.

> Lockpicks actually do something now, the "Strong Picks" perk also now works

> The safe with the shotgun (In the tutorial) now requires a lockpick to open

> Sound effect slider works now

> Larger quantity of enemies around the tutorial level (FYI there are limited enemies)

> The player now gains a flat 5% damage buff and +1 to stamina every 5 levels

> Finally started work on the story, although it still isn't playable yet, sorry :(

> Fixed a bug where the player could take more than they are able to carry

> Fixed a bug where if the player sold less than certain amount they still got paid as if they sold the fixed amount