Several bugfixes (getpic.c, accepted but canceled issues, ...); Listing of available policies

- Bugfixes in fastpath/getpic.c (related to crashes since alpha5)
- Respect Content-Types of images in database
(needs database update, as Content-Type was incorrectly stored by previous versions)
- Typo fixed in help messages
- RSS-Feed (currently only after manual authentication while session is valid)
- Listing of available policies
- German translation fixed: "gebe" -> "gib" (Imperativ)
- Bugfixes related to issues which had been accepted but canceled afterwards
- Prohibit creation of initiatives in disabled areas or with disabled policies

     1.1 --- a/env/util/autoapi.lua	Sun Apr 04 22:05:11 2010 +0200
     1.2 +++ b/env/util/autoapi.lua	Thu Apr 15 19:58:25 2010 +0200
     1.3 @@ -14,8 +14,10 @@
     1.4        elseif field.field then
     1.5          value = row[field.name]
     1.6        end
     1.7 -      if value then
     1.8 +      if value ~= nil then
     1.9          slot.put(encode.html(tostring(value)))
    1.10 +      else
    1.11 +        slot.put("NULL")
    1.12        end
    1.13        slot.put("</", field.name, ">\n")
    1.14      end