Add translation English to Korean

Update translation
Add transition English to Korean

Update Language
Add trainsition English to Korean

Update transition
Add admin transition file of English to Korean

Add admin transition file of English to Korean
Korean transition update.

Changing the WooCommerce to the korean makes error on report graph so, I
put it back as it is
Update Korean Transition

Update Korean Transition
Update Korean Transition

Update Korean Transition
Update for korean Transition

Update for korean Transition
Order Item Meta values filter
Cart item key added to order item meta action
WooCommerce Install Pages Enhancements

When attempting to install a new page:

* only search for pages (ignore posts and other custom post types)
* search for an existing page with the specified page content (typically a shortcode), or if no page content is specified, search for an existing page with the specified page slug.

Should fix #3100 and will also help ensure that WooCommerce only attempts to reuse existing pages that have the WooCommerce shortcodes on them, thus reducing conflicts with other eCommerce plugins.
Revised checkout shipping process. Checkbox within heading. Closes #2571.
Hooks for list of gateways in admin. Closes #2982.
Separate out accounting.js and format dashboard sales currency. Closes #3151.
Hide pay buttons, and block the page correctly. Closes #3235.
Wrap reviewer in tag Closes #3229
Prevent empty dl for meta. Closes #3224.
Updated blockui to prevent errors in WP 3.6.

@coenjacobs this needs to go in .11
Cannot find cause of #3135 - added try catch to prevent fatal errors and inform admin of issue if debug is on

@coenjacobs I don't know if you want to keep this as a preventitive
measure? Should stop bad code breaking things anyway.
Update CONTRIBUTING.md

Updated links.