Minor bug fixes
Change color field type to colorpicker to prevent collision with html5 color field.
Change date field type to datepicker to prevent collision with html5 color field.
Added color (html5) field type
Added date (html5)field type

git-svn-id: https://plugins.svn.wordpress.org/register-settings-api/trunk@1051892 b8457f37-d9ea-0310-8a92-e5e31aec5664