Fix font pixel value. Fix font selection in Chrome

git-svn-id: https://plugins.svn.wordpress.org/text-slider/trunk@952695 b8457f37-d9ea-0310-8a92-e5e31aec5664
Add updated readme.txt

git-svn-id: https://plugins.svn.wordpress.org/text-slider/trunk@952696 b8457f37-d9ea-0310-8a92-e5e31aec5664