We'll have to implement features provided by capybara >= 2.3
Close dup'ed fd after using
Show off the latest release
Initial pack of changes for capybara 2.3 compatibility
Add window support
Merge branch 'upstream_master' into support_modal_apis

Conflicts:
	CHANGELOG.md
	lib/capybara/poltergeist/client/browser.coffee
	lib/capybara/poltergeist/client/compiled/browser.js
	lib/capybara/poltergeist/client/compiled/web_page.js
	lib/capybara/poltergeist/client/web_page.coffee