Fix display of product price drop down menus in admin.
Merge pull request #782 from benhuson/issue_777_dropdowns

Fix display of product price drop down menus in admin.
Currently, the User Account sub-templates are not using wpsc_get_template_file_path(), rather, they were using WPSC_CORE_THEME_PATH to be included.  This caused them to not be moved when copying theme files to the active theme directory, and if they existed within the active theme directory, caused them to not be used.  This commit should resolve that.  Fixes #779.
Resolve Strict Standards notice in new Product UI in Variations Walker.
Add white-space: nowrap to Currency Select.  Causes long country names to not have a wonky height when selected.
Forgive my whitespace auto-fixes. Actual change here is using Dashicons if user is in WP3.8 for X images.
Remove other instance of X for Dashicon replacement.
Fix vertical alignment in External Link metabox.
Add is_file() check.:
Fix anonymous user exclusion when on multisite.
Merge pull request #785 from garyc40/pr-752-2

Fix anonymous user exclusion when on multisite.
Fix memory issues with cron run.
Don't exit when cron finishes
Fix typo in comment.
Merge pull request #786 from garyc40/pr-752-3

Fix memory issues with cron run.
Add doc block for customer meta purge.
More doc blocks
Fix typo
Use dismiss dashicon for WordPress 3.8+
Fix "Product has limited stock" typo.