Adds enviroment markers to requirements.
wxPython
# Pygments # You will not see text syntax highlighted in Text Editor
robotframework
-# Pypubsub 4.0.0 does not support Python 2.7
-# Pypubsub # Uncomment this one if your are on Python 3+ and delete next line
-Pypubsub==3.3.0 # You will see deprecation warning
+Pypubsub==3.3.0 ; python_version <= '2.7'
+Pypubsub ; python_version > '2.7'
# Only for Windows to have a shortcut created (install before RIDE)
-#Pywin32
+Pywin32; sys_platform == 'win32'
