Fixed makefile (for tests extraction)
Moved base for wquf algo to separate folder.
Move recursive algo to separate folder.
Merge branch 'recursive'

Conflicts:
	percolation/Percolation.java
	percolation/PercolationStats.java
	percolation/PercolationVisualizer.java
	percolation/algs4.jar
	percolation/input20.txt
	percolation/makefile
	percolation/percolation-testing.zip
	percolation/stdlib.jar
	percolation_recursive/Percolation.java
	percolation_recursive/PercolationStats.java
	percolation_recursive/PercolationVisualizer.java
	percolation_recursive/algs4.jar
	percolation_recursive/input20.txt
	percolation_recursive/makefile
	percolation_recursive/percolation-testing.zip
	percolation_recursive/stdlib.jar
	percolation_wquf/Percolation.java
	percolation_wquf/PercolationStats.java
	percolation_wquf/PercolationVisualizer.java
	percolation_wquf/algs4.jar
	percolation_wquf/input20.txt
	percolation_wquf/makefile
	percolation_wquf/percolation-testing.zip
	percolation_wquf/stdlib.jar