Opacity: 1 as hover style for icons by default.

git-svn-id: https://plugins.svn.wordpress.org/socials-ignited/trunk@962497 b8457f37-d9ea-0310-8a92-e5e31aec5664
Added all default options in options page.
Changed widget so that the default options are only used when instantiating new widgets.
Fixed CSS output so that unneeded rules are not echoed.

git-svn-id: https://plugins.svn.wordpress.org/socials-ignited/trunk@962500 b8457f37-d9ea-0310-8a92-e5e31aec5664