Lab: State Machines

Cover state machines as a precursor to regular expressions.
added section on NFAs

introduced regular expressions
clarified regexes

Sometimes a dfa simulation is easier to code and debug than a regular
expression.
add illustration of regex

also fixed a few other minor issues
Merge branch 'develop' into dfa

Conflicts:
	Vol3.tex
begin combining labs with RegexBasic

Combining with basic regular expressions.

Added section on regular expressions in Python.
begin application of regular expressions

List the most regular expression operations.
Merge branch 'develop' into dfa
reword some sentences to be more clear.
Merge branch 'develop' into dfa

Conflicts:
	Vol3.tex
added table of regex syntax

other minor fixes
move state machine lab to Python

Lab is not really an algorithm, but more a programming specific lab.
update Volume 3
label the table of regex chars
move database essentials to python labs

Not an algorithm, but more of a Python lab anyway.
fix small typo in sql solutions
add sql labs to vol3
remove erroneous character
Lab: Advanced SQL

Cover advanced topic in SQL databases.  A successor to the SQL lab.
modify db table.