updated web page. Added 'WhatsNew.txt' and changed 'NEWS.txt' by 'NEWS'

NEWS

+##############################################################
+# Previous Releases: see old file 'WhatsNew.txt' for details #
+##############################################################
+
+0.1-54  01-Apr-2012
+0.1.53  23-Mar-2012
+0.1.52  09-Mar-2012
+0.1.51  24-Feb-2012
+0.1.50  23-Feb-2012
+0.1.49  13-Feb-2012
+0.1.48  22-Jan-2012
+0.1.47  16-Jan-2012
+0.1.46  29-Nov-2011
+0.1-45  11-Nov-2011
+0.1-44  28-Oct-2011
+0.1-43  17-Oct-2011
+0.1-42  08-Oct-2011
+0.1-41  05-Sep-2011  
+0.1-40  01-Sep-2011  
+        24-Jun-2011 
+           May-2011
+           Apr-2011
+        29-Dec-2010 
+        23-Dec-2010
+           Dec-2010
+           Nov-2010
+       2009-Oct2010: hydroPSO hibernation :(
+          ~Jul-2008: hydroPSO beginning...