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
Merge branch 'develop' into dfa
clarify a problem statement
remove old regex lab
change language used
Merge pull request #585 from ayr0/keywords

change language used
add more possible problems.

Added more labels to the problems.
Expanded solutions.