Merge pull request #9 from eins78/master

rename: ./$foo.php > ./$foo/index.php
fixed about
reworked activeClass in navbar for new structure
newsgroup: only ask for pw while posting
mitmachen copied page from http://berlin.freifunk.net/participate. @eins78 could you make it shine please? :-)
footer: less is more
index: mitfunken directs to new mitmachen page
name of live map directory changed
image path correction
new navbar suggested by @eins78, worked on #6
[markup] fix the footer
[markup] mitmachen: #fix grid etc
[markup] move body-padding style (for navbar) to <head>

it's valid!