added drawing functions;
unused file removed
simplified main
removed output during program run
style fixes and changes to use StdOut
slope special cases
implementation finds lines of all lengths, ignores subsets/duplicates
earlier/easier determination of duplicate lines by point order
StdDraw commands to make output more readable
avoids creating line objects where duplicates are identified
removed unneeded variables, imports, prints
commented StdDraw statements
algorithm checks if there are enough points to construct lines