Update index.html

Add alt attribute to img.
Adding some "/" for being XML-correct.
Correctiong some errors reported by W3C (there was 105 errors !)
added HTTPS Everywhere
Update fr.json

Correction of some mistakes
Adding some new translations
Add git-annex & git-annex assistant

I add information on git-annex wich is a more than just a dropbox like. The git-annex assistant creates a synchronised folder on each of your OSX and Linux computers, Android devices, removable drives, and cloud services. The contents of the folder are the same everywhere. It's very easy to use, and has all the power of git and git-annex.
Git-annex logo
Merge pull request #16 from RyDroid/patch-2

Update index.html
Merge pull request #17 from RyDroid/patch-3

Update fr.json
Merge pull request #21 from mhvis/master

Update nl.json
add languages
merge in https everywhere
updated mozilla disclaimer
change thunderbird tag from mostly free to rec non-free addons
Update es.json

Fixed some words bad written and finished the translating to spanish.
Merge pull request #24 from Asp1r3-At0m/patch-1

Update es.json
added Catalan article
added Barrapunto article
Add Fedora.
Add Logo.
added PC-WELT article
added wikistrike