/resources/: added mkdir -p of css directory in case it does not exist yet
/resources/ & /tools/: added grid generator tool and generated grid CSS
/resources/img/: added icons for both front and back-office
/resources/scss/: removed body margin/padding in front css
/views/: updated both front and back-office templates with new grid system and added grid example in front
/resources/: moved grid CSS from resources/css to resources/scss so it is included in CSS generation system
/: added resources/css in .gitignore because files there should only be generated via scss