Deleted breadcrumb in default layout and moved it into _includes/masthead.html
Deleted breadcrumb in default layout and moved it into _includes/masthead.html


Former-commit-id: 077824f85506b536812d72697e10a327eb78dfc1 [formerly b005899eec54d00e06b96f05ea4199ddfb0c852c]
Former-commit-id: f239e2188add4bf14d635db2e29e17fcb393933b
LibraryCarpentry/librarycarpentry.github.io,LibraryCarpentry/librarycarpentry.github.io,LibraryCarpentry/librarycarpentry.github.io