Pro version link page added and version updated to 1.1

git-svn-id: https://plugins.svn.wordpress.org/wp-quick-booking-manager/trunk@1038004 b8457f37-d9ea-0310-8a92-e5e31aec5664
updated document

git-svn-id: https://plugins.svn.wordpress.org/wp-quick-booking-manager/trunk@1038006 b8457f37-d9ea-0310-8a92-e5e31aec5664