New files from 1.6.1 : English & French

- added new strings and changes in English to reflect file provided
with 1.6.1
- added those changes in French and made the translations

TO BE NOTED : most new strings added still appears in ENGLISH in
Statamic 1.6.1 though they have been translated...
Changed 1 word
Revert "Changed 1 word"

This reverts commit 3b065734a0d167b8b9d84019bd5f2d04eb747e2f.
Correcting some changes to French 1.6.1
Merge pull request #29 from ebeauchamps/master

New files from 1.6.1 : English & French