Dynamic interface using XMLHttpRequests, and many other changes

Bugfixes:
- Only allow voting on admitted initiatives
- Repaired issue search
- Don't display delegations for closed issues on member page
- Don't show revoke link in initiative, when issue is already half_frozen
- Localization for voting JavaScript
- Display author of suggestions

Disclosure of voting data after voting is finished:
- Possibility to inspect every ballot including preferences
- Show number of voters preferring one initiative to another initiative

Interface behaviour changes:
- Reversed default order of drafts
- Default order of suggestions changed
- Show new drafts of initiatives only once per day in timeline

Accessibility:
- Barrier-free voting implemented
- POST links are now accessible without JavaScript
- Changed gray for unsatisfied supporters in bar graph to a lighter gray

Other interface improvements:
- Optical enhancements
- Dynamic interface using XMLHttpRequests
- Show usage terms in about section
- Show own membership in area listing
- Show uninformed supporters greyed out and marked with yellow question mark
- Warning box in non-admitted initiatives
- When voted, don't display voting notice and change label of voting link
- Show object counts in more tabulator heads
- Enlarged member statement input field

Miscellaneous:
- Code cleanup
- Added README file containing installation instructions
- Use new WebMCP function ui.filters{...} instead of own ui.filter and ui.order functions

     1.1 --- a/env/ui/field/rank.lua	Tue Feb 02 00:31:06 2010 +0100
     1.2 +++ b/env/ui/field/rank.lua	Sat Feb 20 22:10:31 2010 +0100
     1.3 @@ -5,11 +5,11 @@
     1.4        attr = { class = "rank" },
     1.5        content = function()
     1.6          if value == 1 then
     1.7 -            ui.image{ static = "icons/16/award_star_gold_2.png" }
     1.8 +            ui.image{ attr = args.image_attr, static = "icons/16/award_star_gold_2.png" }
     1.9          elseif value then
    1.10 -            ui.image{ static = "icons/16/award_star_silver_2.png" }
    1.11 +            ui.image{ attr = args.image_attr, static = "icons/16/award_star_silver_2.png" }
    1.12          else
    1.13 -            ui.image{ static = "icons/16/cross.png" }
    1.14 +            ui.image{ attr = args.image_attr, static = "icons/16/cross.png" }
    1.15          end
    1.16          if value then
    1.17            ui.tag{