changes in styling. make player responsive.

git-svn-id: https://plugins.svn.wordpress.org/hb-audio-gallery-lite/trunk@838510 b8457f37-d9ea-0310-8a92-e5e31aec5664
Changes in readme.txt

git-svn-id: https://plugins.svn.wordpress.org/hb-audio-gallery-lite/trunk@838511 b8457f37-d9ea-0310-8a92-e5e31aec5664