Merge pull request #157 from gramimoss/master

New Yealink V71 provisioning
Make this more generic for everyone to be able to use and then update everything
Removed .DS_Store files and added to gitignore
Merge pull request #158 from nunovieira/DS_Store

Removed .DS_Store files and added to gitignore
Fix Yealink T2X V71 family
Merge pull request #159 from nunovieira/fix_yealink_t2x_v71

Fix Yealink T2X V71 family