billboard music charts Updates

	a poll was added: Did you watch the Billboard Music Awards of 2015?	over a year ago by Directioner3300
	a link was added: top 40 charts 1950-date	over a year ago by MiraniaTriforce
	a video was added: 2000s charts	over a year ago by MiraniaTriforce
	a video was added: 80s charts	over a year ago by MiraniaTriforce
	a video was added: billboard 100 for end of 2013	over a year ago by MiraniaTriforce
	a link was added: Offical site	over a year ago by MiraniaTriforce