Append "-YYYYMMDD" to the NSIS version string.

setup.py

@@ -22,6 +22,7 @@
 import sys
 import os
 import platform
+import datetime
 
 PROGRAM_NAME = 'PyHoca-GUI'
 # Windows:  UNINSTALL_NAME is for add/remove programs
@@ -35,7 +36,7 @@ __VERSION__ = '0.0.0.0'
 for line in file(os.path.join('pyhoca', 'wxgui', '__init__.py')).readlines():
     if (line.startswith('__VERSION__')):
         exec(line.strip())
-PROGRAM_VERSION = __VERSION__
+PROGRAM_VERSION = __VERSION__ + "-" + datetime.date.today().strftime('%Y%m%d')
 
 PROGRAM_ICON = "pixmaps/pyhoca_x2go-logo-ubuntu.ico"
 # Windows:  UNINSTALL_ICON is for add/remove programs.