remove unused test folders
Add foundation 5.4.0 with rails_layout gem to avoid sass bug
regenerate foundation install to create foundation style file

I don't know why but using with Rails_Layout was not generating the foundations_and_overrides file. It was only referenced as import. This way I have forced its creation and have modified the app layout to also include turbolinks.
pass test checking that foundation is loaded
add vendor theme and test it loads
refactor and polish theme
Merge branch 'dev'