Added (un-)scheduling of cronjob to activate and deactivate routine
Make sure that the cron job (un-)scheduling is also done on (de-)activation.
Merge branch 'master' into Fix-settings-issues

Conflicts:
	inc/wpseo-non-ajax-functions.php
Small fixes
Added line of though about blocking files as a @todo
Revert of "(un-)scheduling of cronjob" => moved to separate branch
..
..
Merge pull request #328 from jrfnl/master

Fix for 'missing argument 3' notice in WP3.7+
Note of potential impact on other yoast plugins
Updated ru_RU, tr_TK and Hr
Fixing issue #359 - shouldn't ever happen as the wp updater is always supposed to pass these, but better be sure
Merge pull request #362 from jrfnl/master

Fixing issue #359
Merge branch 'master' into Fix-settings-issues

Conflicts:
	inc/wpseo-functions.php
	inc/wpseo-non-ajax-functions.php
	uninstall.php