Several bugfixes, including bugfix in timeline

- Fixed grouping of multiple new drafts in timeline
- Do not allow to add suggestions when issue is half frozen
- Do not show initiator invitations for (half-)frozen or closed issues
- Fixed problem with duplicates in display of vote-later requests
- Clarified german "member is participating" info text in delegation chain
- Hide inactive members from member listing

     1.1 --- a/config/default.lua	Sun Mar 07 15:20:51 2010 +0100
     1.2 +++ b/config/default.lua	Sun Mar 07 15:36:54 2010 +0100
     1.3 @@ -1,5 +1,5 @@
     1.4  config.app_name = "LiquidFeedback"
     1.5 -config.app_version = "beta12.3"
     1.6 +config.app_version = "beta13"
     1.7  
     1.8  config.app_title = config.app_name .. " (" .. request.get_config_name() .. " environment)"
     1.9