Merge pull request #332 from aca02djr/master

Regex for validating UK phone numbers
#332: Add UK phone number support for the phone validator, thanks to @aca02djr
#334: Update the Getting Started document, thanks to @jjshoe
#42: Add new ```getSubmitButton()``` method to get the clicked submit button
#336: Add ```$field``` instance to the callback validator
#42: Remove submit button from example
#262: The plugin now doesn't show the errors, feedback icons of given field if there are uncompleted validators
#330: Update the regexp attribute example
#333: Demonstrate using HTML attributes with select element