Update jquery.maskedinput.js

Add support to Android KitKat WebView. 'keypress' event is deprecated, replace with 'input' event if 'keypress' event is not supported.
Update jquery.maskedinput.js

fix caret positions
Update jquery.maskedinput.js
Update jquery.maskedinput.js

Merged with the latest on the main project.
Bit of cleanup for #245
Shouldn't need this android keypress workaround now.
Merge #245