Fixed issue #1288 and fixed duplicated styles
Merge pull request #1289 from LaurentGoderre/v3.0

More robust remote travis.yml (to accomodate the new v4.0 branch)
Move the mixins include to the list include
Merge pull request #1290 from LaurentGoderre/fix-grids-horizontal-menu-print

Fixed issue #1288 and fixed duplicated styles
Merge branch 'v3.0'