- update exportxml and importxml for templates,
- move TemplateElement into separate module,
- remove redundant srctemplatelist module,
- fix editsource so source attribute tab updates when template fields are input,
- fix importcsv so it uses map names defined in citeref module,

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/geps/gep-018-evidence-style@22880 4ae1f11a-8b86-4847-b8af-ab372f36d1fd