Prestashop 1.6 gitignore

.gitignore

.buildpath
.project
.settings
.idea
.svn
.DS_Store
.sass-cache
config.codekit
*.sublime-project
*.sublime-workspace
/.htaccess
# Directories content
cache/class_index.php
cache/smarty/cache/*
!cache/smarty/cache/index.php
cache/smarty/compile/*
!cache/smarty/compile/index.php
cache/tcpdf/*
!cache/tcpdf/index.php

config/xml/*.xml
config/settings.inc.php

log/*.log

img/*
!img/index.php
!img/*/index.php

tools/smarty*/cache/*.php
!tools/smarty*/cache/index.php
tools/smarty*/compile/*.php
!tools/smarty*/compile/index.php

themes/*/cache/*.js
themes/*/cache/*.css
modules/*/config*.xml
# Ignore files on root directory
robots.txt
sitemap.xml

Hi Andrea,
The images in this folder doesn't matter about your versioning.
This folder deal with images for CMS pages, blog articles, products, category img, ..