fix familiar script

I added the original script to web_accessible_resources and instead now i call the inject.js on "content_scripts"
create inject.js 

This file is needed in order to inject the familiar.js in to the page, so it isn't affected by the Isolated Context of the Web browser
see -- https://developer.chrome.com/extensions/content_scripts#execution-environment
Merge pull request #1 from Karlheinzniebuhr/master

Fix Banco Familiar input limiter issue