Correct typo
Remove anchors from links
Remove nav-bar, handle languages with buttons

* Also use language abbreviations
* And remove bootstrap.js (was for menu)
Add intro paragraph (English) as lead
Correct typo
Update README.md
Add text in translation. French still missing
Update README.md
New screenshot
Use ID for footer
Correct typo in translation ids
French translation by @silenius
Merge pull request #41 from Datafable/release-2

Introduction text and no nav-bar
Merge pull request #42 from Datafable/master

Introduction, no nav bar. Closes #40