Merge pull request #8 from jeromelebleu/master

Fix language availability checking
Add PHP script to allow page loading without JS
Add PHP script to allow page loading without JS
Sizing fix
Update help.md pages
PHP retro-compatibility
modify help button link
Avoid too much redirections
Update app.js
[enh] change | by dot
[rev] Do not include Piwik in index.html
[enh] Add a previous button & anchor support
[fix] Firefox scrolling fail
[fix] Static page loading
[fix] do not send to index when reloading a /#/* page
Smooth page transition
[fix] fading blink
[enh] Add logo
[enh] Tooltip lika baws
[fix] Static index link