Declare the dependency on py3o.template - fix #3

__openerp__.py

@@ -15,6 +15,9 @@ The py3o.template package is required; install it with:
     'depends': [
         'base'
     ],
+    'external_dependencies': {
+        'python': ['py3o.template']
+    },
     'data': [
         'ir_report.xml',
     ],

py3o_report.py

@@ -32,7 +32,7 @@ class py3o_report(report_sxw):
                                [('code', '=', lang_code)],
                                context=context)[0]
         return lang_obj.browse(cr, uid, lang, context=context)
-    
+
     def format_date(self, date, values):
         ''' Return a date formatted according to the language extracted from
         the "values" argument (which should be the result of get_values). '''