Create the Database Essentials lab.
Merge branch 'develop' into jared
Fixed stuff so that it compiles
Merge branch 'develop' of git://github.com/byuimpact/numerical_computing into sql
Merge branch 'develop' of git://github.com/byuimpact/numerical_computing into sql
Changed to SQLite
Add more content to the SQL lab

Add a section that explains what relational databases are and what SQL
is.
illustrate parts of a relation
add tables for sql commands
modify tables

Add more explantion of the SQL language.
move line to appropriate place in command.tex

Make a more logical grouping.
add tables for demonstration purposes
remove section on joins

Joins will be covered in the second database lab along with the more
advanced used of SQL.
added paragraph on updating a table.
small example of iteration through result set.
put fetch methods into a table.
remove outdated solutions file.
added solutions file.
add new icd9 select problem
Some minor corrections and expansions to Intro to Database lab.