Allow finder options to be passed to elements
Merge branch 'finder_options' of git://github.com/dkastner/capybara-wheel into dkastner-finder_options

Conflicts:
	lib/capybara/wheel/page.rb
	spec/page_spec.rb
Added options to subelement (to complement @dkastner adding them to element). Selector and options are set via one mechanism, instead of two.
Version 0.0.7