working addition of node :
	they are added correctly in the good order
Updating readme
removing unneeded print
adding test for dht playground
something was wrong in the addToRing function
moving dht utils and test to another folder
changing id type to byte[]
-changing the type of id from []byte to string
-add a working naive lookup method
changing the Between signature (use string form more consistence)
remove access to func sha1hash
adding a test for the lookup function
adapting the class to work with 160bits space
adding comment to disance func
lookup test with 3bit space
adding a test for distance func
adding printNodeInfo func
adding the testCalcFinger func
adding a comment for lookup func
updating doc
minor comments and pretty printing
udating readme