Fixed bug #729: Adding full_url_static jinja function and used it in base email

taiga/base/templates/emails/base.jinja

@@ -95,7 +95,7 @@
                                     <td>
                                         <a href="{{ home_url }}"
                                            title="{{ home_url_name }}">
-                                           <img src="{{ static("emails/email-logo.png") }}" alt="Taiga" height="32" />
+                                           <img src="{{ full_url_static("emails/email-logo.png") }}" alt="Taiga" height="32" />
                                         </a>
                                     </td>
                                 </tr>

taiga/base/templatetags/__init__.py

@@ -0,0 +1 @@
+

taiga/base/templatetags/functions.py

@@ -0,0 +1,24 @@
+# Copyright (C) 2014 Andrey Antukh <niwi@niwi.be>
+# Copyright (C) 2014 Jesús Espino <jespinog@gmail.com>
+# Copyright (C) 2014 David Barragán <bameda@dbarragan.com>
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from django_jinja import library
+from django_sites.utils import static
+
+register = library.Library()
+
+@register.global_function
+def full_url_static(text) -> str:
+    return static(text)