Added internationalization (see languages folder for the .po files)

Fixed showing double content when both excerpt and content were checked.

Read More button can now optionally be shown when showing the page excerpt
as suggested by Jodie Burnette

git-svn-id: https://plugins.svn.wordpress.org/genesis-featured-page-extended/trunk@839771 b8457f37-d9ea-0310-8a92-e5e31aec5664