skeleton for problem set 4

modified:   ../../bin/latexRegex.pl
modified:   GNUmakefile
modified:   basicStatMechProblemSet4.tex
modified:   basicStatMechProblemSet4Problem1.tex
modified:   basicStatMechProblemSet4Problem2.tex
new file:   basicStatMechProblemSet4Problem3.tex
modified:   renumber