reverted rich snippet currency to priceCurrency due to a typo in Googles Rich Snippets docs
Merge pull request #6160 from splashingpixels/rich-snippet

reverted rich snippet currency to priceCurrency due to a typo in Googles...
Queue language check on install + store checked lang code in option

@claudiosmweb
Fix extra delimiter in breadcrumbs Closes #6153
Replace usage of WPLANG with get_locale() for installs without WPLANG set

cc @claudiosmweb
Replaced get_language call for get_locale
Removed the 'delete_users' case.
Related #6102
Merge pull request #6164 from barrykooij/master

Removed the 'delete_users' case.
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