made a modification in the 'mouseover' event

made a modification in the 'mouseover' event, so that this plugin can get content for each item by calling a function.

here is what usage looks like:

$(".J_versionBadge").tinyTips({
........content: function(actionItem){
................var commit = actionItem.context.dataset['commit'];
................commit = commit + "check finished";
................return commit;
........},
});