Added link menu links: rich snippets, html validation, and css validation.
Added menu link for Facebook Debugger.

Finding it common where users report issues when having WordPress SEO and Jetpack installed. The Facebook Debugger comes in handy to check for duplicate or errors with opengraph tags.
Mini readme fix

Duplicate change message, once at wrong version
Issue #736: Fix Alexa ID string validation

And further code abstraction/simplification or the verification string validations including nice error messages
Issue 733 - Fix issue with Soliloquy image query
Merge remote-tracking branch 'Yoast/master' into Issue-733-js-error

Conflicts:
	readme.txt
Merge remote-tracking branch 'Yoast/master' into Mini-readme-fix
Removed the validator link
Merge branch 'pr/298'

Conflicts:
	inc/wpseo-non-ajax-functions.php
Change log update
Removed CSS validation link.
Merge pull request #759 from jrfnl/Mini-readme-fix

Mini readme fix
Merge branch 'pr/757'

Conflicts:
	readme.txt
Issue 736: Improved Alexa ID validation

Found in the WP forum that _ and - are allowed too
Merge branch 'pr/758'

Conflicts:
	readme.txt
Merge branch 'master' of git://github.com/Yoast/wordpress-seo into Issue-736-2-improved-AlexaID-validation
Merge pull request #761 from jrfnl/Issue-736-2-improved-AlexaID-validation

Issue 736: Improved Alexa ID validation
Fix white screen/blog down issues caused by some (bloody stupid) webhosts actively disabling the filter extension
Merge branch 'master' of git://github.com/Yoast/wordpress-seo into Prevent-issues-when-filter-ext-missing
Merge pull request #763 from jrfnl/Prevent-issues-when-filter-ext-missing

Prevent issues when filter ext missing