adding support for selectTag.option tag to accept attributes other than value i.e. data-*, related to issue #325 on mde/geddy#325.
changed the selectTag.option.selected operators' to something a little simpler than ternary operator, related to issue mde/geddy#325
updating docs mde/geddy#325
selectTag.option.selected now gurantees to take the selectedOption param as the primary selected option, if not it falls back to the attrs.selected, else 'not selected', that turnary op is back, sorry.
moving newer tests after the older ones previous ones, mde/geddy#325
Merge pull request #344 from akhoury/select_tag_options_attrs_support

adding support for selectTag.option tag to accept attributes