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/app/main/_layout/atom.html	Sun Apr 04 22:05:11 2010 +0200
     1.2 +++ b/app/main/_layout/atom.html	Thu Apr 15 19:58:25 2010 +0200
     1.3 @@ -1,12 +1,5 @@
     1.4  <?xml version="1.0" encoding="utf-8"?>
     1.5  
     1.6  <feed xmlns="http://www.w3.org/2005/Atom">
     1.7 -  <author>
     1.8 -    <name>foo</name>
     1.9 -  </author>
    1.10 -  <title>LiquidFeedback</title>
    1.11 -  <subtitle>Initiatives</subtitle>
    1.12 -  <id>urn:uuid:60a76c80-d399-11d9-b93C-0003939e0af6</id>
    1.13 -  <updated>2003-12-14T10:20:09Z</updated>
    1.14    <!-- WEBMCP SLOTNODIV default -->
    1.15  </feed>