Add twitter followers count block

Issue #3
Move twitter followers count block to his own directory and updtate translation

issue #3
Add translation on followers' count label
Merge pull request #9 from BenoitLeveque/twitter-followers-block

Add twitter followers count block
fix issue #11 warning on line length with scrutinizer-ci
Merge pull request #12 from BenoitLeveque/issue_11-cs-line-length

fix issue #11 warning on line length with scrutinizer-ci