Add an info button in NUX welcome screen
Merge branch 'feature/nux-info-button' into issue/669-add-info-button-to-login-screen
add content description to the help icon
Merge branch 'develop' into issue/669-add-info-button-to-login-screen

Conflicts:
	res/layout/nux_fragment_welcome.xml
	res/values/strings.xml
	src/org/wordpress/android/ui/accounts/WelcomeFragmentSignIn.java
fix #842: if the device is rotated while adding a self-hosted site, it returns to the .com login layout
fix #669: add an help button in the nux
fix buttons padding in nux dialog
add the info/help button to the create account screen
Merge pull request #843 from wordpress-mobile/issue/669-add-info-button-to-login-screen

fix #669: add an info button to login screen