Fixed Some Bugs Related to 0.0.4

Fixed some bugs with the dialogue system:
- Pressing 'E' again while the text is still playing would result in the text turning into gibberish.

- The text that displays after already finishing the first dialogue would be activated for every npc in the room, basically meaning if you've spoken to one, you've spoken to them all. 

Also for clarification, left clicking continues the conversation, and also finishes the conversation to activate the "Already talked to" dialogue. Looking away just resets it.