added new fixes
#1 added check for html5 support
#2 check if it is new IE


git-svn-id: https://plugins.svn.wordpress.org/contact-form-7-datepicker-fix/trunk@842356 b8457f37-d9ea-0310-8a92-e5e31aec5664
go to vers. 2.3


git-svn-id: https://plugins.svn.wordpress.org/contact-form-7-datepicker-fix/trunk@842357 b8457f37-d9ea-0310-8a92-e5e31aec5664