Bug #657808 - Copy/move of a single instance should grab whole serie
Bug 707112 - Replace webkit_dom_html_element_get_id usage

webkit_dom_element_get_id() was introduced for WebKitGTK+ 2.2 and
deprecates webkit_dom_html_element_get_id().  But Evolution only
requires WebKitGTK+ 2.0.1.

Ordinarily this would sit on a shelf until we require WebKitGTK+ 2.2,
however WebKitGTK+ has now started issuing deprecation warnings about
webkit_dom_html_element_get_id() at *runtime*, which is pointless and
only fills up users' .xsession-errors file.

To put a stop to this, we'll call the new function subject to a pre-
processor WebKit version check, with a fallback to the old function.

The build requirement remains at WebKitGTK+ 2.0.1.
Updated Spanish translation
Fix an issue found by Coverity Scan introduced by a commit for bug #657808
Bug #711477 - Print/export tasks/memos without summary displays "(null)"
Updated POTFILES.in
Updated Greek translation
Bug 711532 - Infinite recursion from message/news attachment

This is only a partial solution for the test case the bug report.
The message/news part of the test case is also Base64-encoded, but
Evolution (or Camel) is not decoding it properly.  Still digging.
Follow-up fix for bug 711532.

Content-Disposition of the test case is honored now, but still not the
Content-Transfer-Encoding.
Make e_attachment_set_file_info() thread-safe.

Missed this one in commit 9058c6f85dc49f9500e7e67819acfd8c0d2d369c.