Initial Lesson4 Commit
Adding basic data file
More data
Adding descriptions to the books
Wire up the index to a DB Query
Basic search implemented
Removed log.Fatal calls in favor of panic
Cleaned up the SQL code.

        - sql.Query is now using a param
        - One endpoint to rule them all
        - Multiline string
        - fmt.Fprintf on response writer to avoid string buf
Removed semicolon
Cleaned up panic checks
Remove Reviews from data for this lesson
Merge pull request #6 from GopherCasts/JNB-Lesson4

Add Lesson 4 Code