Removed some unused if conditionals. Seems to improve code readability
Fixed public methods in PercolationStats API. Also, addressed the
calculation of mean and stddev.. Now results are more aligned with the
example:

% java PercolationStats 200 100
mean                    = 0.5929934999999997
stddev                  = 0.00876990421552567
95% confidence interval = 0.5912745987737567, 0.5947124012262428
Fixing Array type to boolean for Percolation.. should fix memory usage
PercolationStats now uses double insted of int.. am getting output for
input size 200 with 10 iterations
Hack code.. after looking at other options
Percolation: Using 2 WeightedUnion instance hack, cheating isFill to
display correctly
PercolationStats: Need help with the logic, for now mimic'd:
http://code.google.com/p/jacob-simon-opgaver/source/browse/src/Percolation/PercolationStats.java?r=5
Findbugs and Checkstyle suggested changes to code
Removed un-used boolean array for Percolation
Fixed a bug in PercolationStats that was incorrectly computing the
number of open sites. Resolution was to check for isOpen with each
randomx, randomy co-ordinate
Revert "Removed un-used boolean array for Percolation Fixed a bug in PercolationStats that was incorrectly computing the number of open sites. Resolution was to check for isOpen with each randomx, randomy co-ordinate"

This reverts commit b330992bdf13ce04a0bc5f5c68a8727c1dc5b28f.