Add first version of Manipulating SQL. Update all cross-links.
Some editing after review.
Experimenting with heading levels.
Add update and SQL DSL sections.
Refactor namespace usage.
Cleanups after reviewing.
More editing cleanups after reviewing.
More editing cleanups. Add section on query parameters.
More editing cleanups after spousal review.
Update cross-links to conform to book usage.
Change illegal use of level-4 headers back to level-5, 5s become 6s.
Merge pull request #235 from hickst/aug24-30

Added recipe for manipulating SQL database via clojure.java.jdbc.