removed ibu column from guest beers on menu.  closes #43
made tasting_notes on beer model
add tasting_notes stuff to views, controller
made /admin/tasting_notes
Merge branch 'feature/beer_tasting_notes' into develop
add tasting notes link to admin nav
responsive sass mixins
fixed horizontal scrolling issues
made nav responsive
made more responsive sass mixins
made nav use just one actually responsive element instead of two
Merge branch 'feature/responsive' into develop
Merge branch 'develop'