Merge branch 'mkdocs' into 'master'

.gitignore

README.md

SUMMARY.md

book.json

distributions/README.md

docs/distributions/c8.md

docs/distributions/cc7.md

docs/distributions/slc6.md

docs/distributions/supported.md

docs/index.md

docs/introduction/permissions.md

docs/introduction/prereq.md

docs/linux/aims2.md

docs/linux/doc.md

docs/linux/help.md

docs/linux/install.md

docs/linux/kerberos.md

docs/linux/kickstart.md

docs/linux/licenses.md

docs/linux/locmap.md