#778: README.md, add 'MariaDB Database' subsection
#778: README.md, initial definition for 'MariaDB Database' subsection
#778: README.md, adjust language
#778: README.md, add 'interesting features of MariaDB'
#778: README.md, describe default MariaDB configurations
#778: README.md, minor markdown change
#778: README.md, minor language change
#778: README.md, minor language change
#778: README.md, add 'Note:'
#778: README.md, minor language change
#778: README.md, minor typo fix
#778: README.md, minor language change
#778: README.md, add 'Note'
#778: README.md, minor language change
#778: README.md, link text
#778: README.md, minor language change
#778: README.md, minor language change
#778: README.md, minor language change
#778: README.md, minor language change
Merge pull request #809 from jeff1evesque/doc_mariadb_database

#778: Add 'MariaDB Database' Subsection