whitespace
Added get_current_theme_name() method which uses wp_get_theme() if it's available and falls back to get_current_theme() if not.

This in turn avoids the deprecation notice which is shown when WP_DEBUG is true on WP versions > 3.4 and prevents IWP admin panel breakage.
The IWP admin panel "breaks" only visually (in the sense that the processQueue counter never finishes, since the AJAX response from the WP client sites includes warnings/notices before the <IWPHEADER> part)
Merge branch 'fix-get-current-theme'