General:
Started working on new demos/tutorials.

Button:
Fixed documentation.

ScreenElement:
Fixed an error that caused move transform commands to work improperly.

TextBox
Changed variable 'complete' to 'ready'

Scene:
Added in checks anytime that the next action was being taken immediately.
Added in the "wait" command which makes the scene unable to continue for a given amount of time and parse wait to take care of that command.
Added in "onComplete" so it will do something when it is out of actions to perform.
Added in clearing screen in there is no background Image.
Modified loadScript to make sure that only lines starting with "define" would be accepted as definitions instead of any line with "define" in it.
Fixed parsing of "add" command so that it now works as intended.
Modified the parsing of dialog so that it now has to be inside quotation marks.
Added in "and" command that will perform actions after dialog instead of stopping.
Added in isReady function to determine if the Scene can move on.