New option added in widget setting form to control scrolling speed and delay.

git-svn-id: https://plugins.svn.wordpress.org/information-reel/trunk@998570 b8457f37-d9ea-0310-8a92-e5e31aec5664
readme.txt updated.

git-svn-id: https://plugins.svn.wordpress.org/information-reel/trunk@998573 b8457f37-d9ea-0310-8a92-e5e31aec5664