add favicon iamges
fix Gruntfile to copy favicon files
add favicon samples
refactoring
Merge remote-tracking branch 'origin/master' into 73271184-style-favicons
refactoring icons & favicons style in docs
do scsslint while dev
remve extra space
update Grunt buils css files
Merge pull request #25 from gengo/73271184-style-favicons

[#73271184] Style favicons
Travis build 98