Make the examples more idiomatic.
Add tour.md with a more in-depth explanation of jdub use.
Formatting and headers.
Fix bug in sealed class example.
Address comments from emilyst and swenson.
Implement README examples in DatabaseSpec.
Bring README in line with DatabaseSpec.
For real this time.
A few typos.
Query is a trait, not a class.
Wording improvements to tour.md.
Addressing ieure's comments.

Throughout source code and docs, values is now defined using Seq()
rather than cons-style syntax (:: with Nil).
Add missing brace in tour.md example.
Add discussion of Query use cases.
Merge pull request #41 from jklukas/master

Tour of Jdub