Bug fix/bug prevention/consistancy: Checked all used of preg_ functions for best practices
And some more of the same
* Added two suggestions for regex improvement, one fully worked out
Replaced a number of unneeded preg_() calls with the more efficient strpos() and substr_replace()

Improved one regex combi call to be more efficient
Identified potential bug and provided fix suggestion.
Potential bugfix when replytocom link use " instead of ' as attribute delimiter + suggestion for future improvement
Added initials to fixes not yet applied so if anyone needs to discuss, they know who to discuss with ;-)
Fixed bug in processing of %%ct_<custom-tax-name>%% - hoping I've 'guessed' right about the cause as I haven't seen any error notices yet.
Oh dear, need admin_notices instead of wpseo_all_admin_notices of course as this notice will more likely display on a post save. Moved function to more appropriate file too.
Better. Now it is really fixed ;-)
Removed superfluous gitignore
Reverted .gitignore to original
Added 'wpseo_terms' filter
Updated Facebook supported locales list for og:locale

Results: 1 new locale added, found 32 in the below list which are not in the FB list (not removed), 76 OK.
OpenGraph image tags will now also be added for images added to the post via shortcodes, as suggested by msebald
Usability update for meta tag description check. Code tested in both WP 3.5.2 as well as WP 3.6RC1.

* Bugfixes
	* Fixed: Meta description tag discovery looked in parent theme header file even when a child theme is the current theme.
	* Fixed: Using the 'Fix it' button would remove the meta description tag from the parent theme header file, even when a child theme is the current theme.
	* Fixed repeated unnecessary meta description tag checks on each visit to dashboard page.
	* Fixed: Using the 'Fix it' button would fail if it had already been used once (i.e. if a wpseo backup file already existed), which prevented the removal of meta description tags in upgraded theme header files.
	* Fixed: Meta description 'Fix it' feedback message was not shown.

* Enhancements
	* Added checks for the meta description tag on theme switch, on theme update and on (re-)activation of the WP SEO plugin including a visual warning if the check would warrant it.
	* Added the ability to request re-checking a theme for the meta description tag. Useful when you've manually removed it  and want to get rid of the warning as inspired by [tzeldin88](http://wordpress.org/support/topic/plugin-wordpress-seo-by-yoast-your-theme-contains-a-meta-description-which-blocks-wordpress-seo).
Updated readme
Mini-fix for plugin_dir_url + 2 x removed superfluous /
Accommodated for utf-8 phrases in the pattern in three more places (where preg_quote() was used)
Checked all methods for:

* proper html, i.e. "..." not '...' for attributes
* avoiding sending empty tags - especially with all the filters, you never know whether they are used properly
* proper use of esc_attr()/esc_url()