[r22831]GrampsLocale:Add Greek and English to MSlocales

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@22834 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
[r22832]Ensure en_US encoding is UTF-8

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@22835 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
[r22833]Fix crash when Gramps is passed an invalid locale

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@22836 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
Remove redundant imports

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@22838 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
[r22840]Consolidate mslocales and self._lang_map

into a single dict for easier maintenance

Thanks to Paul Franklin for suggesting it

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@22841 4ae1f11a-8b86-4847-b8af-ab372f36d1fd