Version 1.5.0 - Dialogue updates & bug fix

Cutscene engine Version 1.5.0 | Updates to dialogue and bug fix

BIG CHANGES

- In dialogue: Now the speakers face sprite can be of any size and it will be automatically resized

- In dialogue: Added possibility to change the volume and interval of textbox sound (optional arguments in cutscene_dialogue_sound).

LITTLE CHANGES

- Changed the default size of the textbox. Now it's slightly smaller.

- In dialogue: Continue icon now shows after the delay, when it's actually possible to continue. It's a small change, but makes the dialogue feel better.

BUG FIXES

- Edited code in control_cutscene room start event & step event & cutscene_next to prevent non existent original camera object error