module for Princeton algo course created for first Programming assignment:
http://coursera.cs.princeton.edu/algs4/assignments/percolation.html
added classes and arg checks from task description
added  stdlib.jar and algs4.jar  sources as external module from
http://coursera.cs.princeton.edu/algs4/assignments/percolation.html
stdlib.jar and algs4.jar sources moved to packages (from default)
added algs4 dependency to percolation project
percolation implemented
PercolationStats implemented
refactored, styled, commented Percolation.java
a little bit tests in main method
set Percolation.java last updated date (today nightly code)
methods rearranged at Percolation.java
refactored, styled and commented PercolationStats.java
minor refactor - 80 symbols per line
isFull method was misunderstood. Implementing in case where isFull returns true
 only if "water fills this site".
isFull method was misunderstood. Corrected PercolationStat class.
validateIndices bug fix
added author email to comments
Percolation.java percolates() optimized, fixed isFull, corner case N=1 optimization
Percolation.java does not need countOfOpened ivar anymore, removed
style fix
failed while trying avoid for loop in open