Add explicit file encoding to all Mako templates.

Also remove some u"" style strings within templates, since they appear to
be unnecessary.

tailbone/templates/products/batch.mako

@@ -1,3 +1,4 @@
+## -*- coding: utf-8 -*-
 <%inherit file="/base.mako" />
 
 <%def name="title()">Create Products Batch</%def>

tailbone/templates/products/crud.mako

@@ -1,3 +1,4 @@
+## -*- coding: utf-8 -*-
 <%inherit file="/crud.mako" />
 
 <%def name="context_menu_items()">

tailbone/templates/products/index.mako

@@ -1,3 +1,4 @@
+## -*- coding: utf-8 -*-
 <%inherit file="/grid.mako" />
 
 <%def name="title()">Products</%def>

tailbone/templates/products/read.mako

@@ -1,3 +1,4 @@
+## -*- coding: utf-8 -*-
 <%inherit file="/products/crud.mako" />
 
 <%def name="head_tags()">
@@ -19,7 +20,7 @@
   ${form.render()|n}
 
   % if image:
-      ${h.image(image_url, u"Product Image", id='product-image', path=image_path, use_pil=True)}
+      ${h.image(image_url, "Product Image", id='product-image', path=image_path, use_pil=True)}
   % endif
 </div>