Add pastealacon backend for CapPaste

Sadly, not posting for now, for two reasons:
* we get a captcha very often
* the form page seems invalid and mechanize is not able to select the form

weboob/backends/pastealacon/paste.py

@@ -0,0 +1,30 @@
+# -*- coding: utf-8 -*-
+
+# Copyright(C) 2011 Laurent Bachelier
+#
+# This file is part of weboob.
+#
+# weboob 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.
+#
+# weboob 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 weboob. If not, see <http://www.gnu.org/licenses/>.
+
+
+from weboob.capabilities.paste import BasePaste
+
+
+__all__ = ['PastealaconPaste']
+
+
+class PastealaconPaste(BasePaste):
+    @classmethod
+    def id2url(cls, _id):
+        return 'http://pastealacon.com/%s' % _id