AlgLinI_P3_1sem2012.dat: real file with that frequent mistakes on
			 filling the optical form.
grade.pl: added code to check class and test type for each student, and
	  improved HTML table reader to show Sub and Rec instead of P4
	  and P5
master.tex: Insert first page with instructions for students and a last
	    page where students mark their answers to take with them.
master.tex: renamed sample anser key jpeg inserted in the test's first
	    page to front-gabarito.jpg
front-gabarito.jpg: sample answer key jpeg to be in the first page with
		    instructions to the test.
grade.pl: Fixed name of input file (from optical reader). Now it has the
	  form mat-2457-p$prova-t$class.dat.
sample1.dat, sample2.dat: Rescetively renamed to mat2457-p1-t1.dat and
	     		  mat2457-p2-t1.dat.
mat2457-p1-t1.dat, mat2457-p2-t1.dat: These are the new names for
		   		      sample1.dat and sample2.dat,
		   		      respectively.
grade.pl: Removed a chekpoint line in function hdr_print() function.
clean.sh: fixed name of .tex files to be removed.
.gitignore: changed name of .tex files to be ignored.
test_span.pl: added parameter to create test permutations with
	      meaningful names (year, which test, which type). Added
	      parameter to call get_hdr (intended to be the name of
	      masterfile).
.gitignore, clean.sh, clones.sh, grade.pl, loa.pl: changed to fit the better names for the generated files, now indicating year, test and class.

mat2457-p{1,2}-t1.dat: renamed to include the year of the test.
.gitignore, grade.pl: fixed filenames to be ignored and filenames for
	    	      optical reader.

mat2457-2013-optica-*.dat: new standard filename for files from the
			   optical reader.
mat2457-2013-optica-t1-*.dat: new standard filename for files from the
			      optical reader.
.gitignore: fixed ignored filenames

grade.pl: fixed optical reader filename.
clones.sh: using hardlinks to clones instead of soft ones, to prevent
	   reveal of magic number.

clean.sh: commented unused links removal.
grade.pl: added validation to number of digits in student id.
grade.pl: fixed range for student classes, from 01 to 13 and 20.
grade.pl: wrote better regular expressions to validate student's class
	  and indented optical reading error messages.