fixed icons issue
header navigation update
deleted unnecessary files
removed unnecessary files
#2 Add and change grid utilities classes for new grid breakepoints

Utility classes:
* .visible-*-block
* .visible-*-iniline
* .visible-*-inline-block
Merge branch 'master' of github.com:tsr-elion/tsr-bs3
Merge branch 'master' into footer

Conflicts:
	app/assets/styles/_footer-navigation.scss