add PDF of textbook for my own private reference
add RA installation
add slides
add .gitignore
remove unidentified transcript
update README
add video README files
update README
Merge branch 'master' of ssh://bitbucket.org/dpb/databases_widom
update README
add renamed slides
add tools.md
initialize DTD content
update README
update README
update README
update README
update README
update README
update README