support for Google Analytic

git-svn-id: https://plugins.svn.wordpress.org/redi-restaurant-reservation/branches/GoogleAnalytic@902362 b8457f37-d9ea-0310-8a92-e5e31aec5664
Add event call on reservation success

git-svn-id: https://plugins.svn.wordpress.org/redi-restaurant-reservation/branches/GoogleAnalytic@902390 b8457f37-d9ea-0310-8a92-e5e31aec5664
proper way to check if variable is undefined in js

git-svn-id: https://plugins.svn.wordpress.org/redi-restaurant-reservation/branches/GoogleAnalytic@902520 b8457f37-d9ea-0310-8a92-e5e31aec5664
Added Google Analytics Tracking Code

git-svn-id: https://plugins.svn.wordpress.org/redi-restaurant-reservation/trunk@903334 b8457f37-d9ea-0310-8a92-e5e31aec5664