Removes model from collection if...

- scoreboard is closed.
- new score is not high score.
Corrects removal of ScoreIt.Live.Collections.
Prevents game from being played when scoreboard is visible.
Makes score form fields required fields.
Styles scoreboard more attractively.
Remove extraneous console.log.
Solves issue of flash of no scoreboard after enter high score.
Adds fetchCollection function to Scoreboard View.
Adds isHighScore function to Scoreboard View.
Can now specify the number of scores to be displayed in the scoreboard.
Corrects view isHighScore function to use view's numScores attribute.
Adds more client-side validations to scoreboard fields.
Tweaks styling, so scoreboard width varies less wildly.
Breaks new score form on to multiple lines to increase legibility.