Add options to serializeJSON function: {parseNumbers, parseBooleans, parseNulls, parseAll}. Test with default options. It doesnt parse anything by default, values are always strings.
Create test case for checkboxes with hidden inputs as default values
Add spec cases for options and defaultOptions {parseNumbers, parseBooleans, parseNulls, parseAll}
Improved README file with examples about parsing options
Bump version to 1.3.0 and generate js.min file