Implement due dates for cards

Signed-off-by: Julius Härtl <jus@bitgrid.net>

appinfo/database.xml

@@ -130,7 +130,6 @@
                 <name>last_modified</name>
                 <type>integer</type>
                 <default></default>
-                <length>8</length>
                 <notnull>false</notnull>
                 <unsigned>true</unsigned>
             </field>
@@ -138,7 +137,6 @@
                 <name>created_at</name>
                 <type>integer</type>
                 <default></default>
-                <length>8</length>
                 <notnull>false</notnull>
                 <unsigned>true</unsigned>
             </field>
@@ -159,6 +157,11 @@
                 <type>boolean</type>
                 <default>false</default>
             </field>
+            <field>
+                <name>duedate</name>
+                <type>timestamp</type>
+                <default>0</default>
+            </field>
             <index>
                 <name>deck_cards_stack_id_index</name>
                 <field>

appinfo/info.xml

@@ -16,7 +16,7 @@
 💥 This is still alpha software: it may not be stable enough for production!
 
 </description>
-    <version>0.1.4.2</version>
+    <version>0.1.4.3-1</version>
     <licence>agpl</licence>
     <author>Julius Härtl</author>
     <namespace>Deck</namespace>