Add ir.message and use custom exceptions

issue3672

message.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0"?>
+<!-- This file is part of Tryton.  The COPYRIGHT file at the top level of
+this repository contains the full copyright notices and license terms. -->
+<tryton>
+    <data group="1">
+        <record model="ir.message" id="msg_invalid_distribution">
+            <field name="text">To save account "%(account)s" the sum of their distributions must be 100%%.</field>
+        </record>
+        <record model="ir.message" id="msg_missing_root_account">
+            <field name="text">To save "%(name)s" you must set a value for analytics "%(analytics)s".</field>
+        </record>
+        <record model="ir.message" id="msg_root_origin_unique">
+            <field name="text">Only one account is allowed by analytic root and origin.</field>
+        </record>
+    </data>
+</tryton>